Changelog¶
Python 3.5.10 final¶
Release date: 2020-09-05
Python 3.5.10 release candidate 1¶
Release date: 2020-08-19
Security¶
- bpo-29778: Ensure
python3.dllis loaded from correct locationswhen Python is embedded (CVE-2020-15523). - bpo-41004: CVE-2020-14422: The __hash__() methods ofipaddress.IPv4Interface and ipaddress.IPv6Interface incorrectly generatedconstant hash values of 32 and 128 respectively. This resulted in alwayscausing hash collisions. The fix uses hash() to generate hash values forthe tuple of (address, mask length, network address).
- bpo-39073: Disallow CR or LF in email.headerregistry.Address arguments toguard against header injection attacks.
- bpo-38576: Disallow control characters in hostnames in http.client,addressing CVE-2019-18348. Such potentially malicious header injectionURLs now cause a InvalidURL to be raised.
- bpo-39503: CVE-2020-8492: The
AbstractBasicAuthHandlerclass of theurllib.requestmodule uses an inefficient regular expression whichcan be exploited by an attacker to cause a denial of service. Fix theregex to prevent the catastrophic backtracking. Vulnerability reported byBen Caller and Matt Schwager. - bpo-38945: Newline characters have been escaped when performing uuencoding to prevent them from overflowing into to content section of theencoded file. This prevents malicious or accidental modification of dataduring the decoding process.
- bpo-38804: Fixes a ReDoS vulnerability in
http.cookiejar. Patch byBen Caller.
Library¶
- bpo-39017: Avoid infinite loop when reading specially crafted TAR filesusing the tarfile module (CVE-2019-20907).
- bpo-41183: Use 3072 RSA keys and SHA-256 signature for test certs andkeys.
- bpo-39503:
AbstractBasicAuthHandlerofurllib.requestnow parses all WWW-Authenticate HTTP headers andaccepts multiple challenges per header: use the realm of the first Basicchallenge.
Python 3.5.9 final¶
Release date: 2019-11-01
There were no new changes in version 3.5.9. 3.5.9 was released because of aCDN caching problem which resulted in some users downloading a prereleaseversion of the 3.5.8 .xz source tarball. 3.5.9 is identical to the proper3.5.8 release.
Python 3.5.8 final¶
Release date: 2019-10-28
Security¶
- bpo-38243: Escape the server title of
xmlrpc.server.DocXMLRPCServerwhen rendering the document page asHTML. (Contributed by Dong-hee Na inbpo-38243.)
Python 3.5.8 release candidate 2¶
Release date: 2019-10-12
Library¶
- bpo-38216: Allow the rare code that wants to send invalid http requestsfrom the
http.clientlibrary a way to do so. The fixes forbpo-30458led to breakage for some projects that were relying on this ability totest their own behavior in the face of bad requests.
Python 3.5.8 release candidate 1¶
Release date: 2019-09-09
Security¶
- bpo-37461: Fix an infinite loop when parsing specially crafted emailheaders. Patch by Abhilash Raj.
- bpo-35907: CVE-2019-9948: Avoid file reading by disallowing
local-file://andlocal_file://URL schemes inURLopener().open()andURLopener().retrieve()ofurllib.request. - bpo-34155: Fix parsing of invalid email addresses with more than one
@(e.g. a@b@c.com.) to not return the part before 2nd@as valid emailaddress. Patch by maxking & jpic. - bpo-36742: Fixes mishandling of pre-normalization characters inurlsplit().
- bpo-30458: Address CVE-2019-9740 by disallowing URL paths with embeddedwhitespace or control characters through into the underlying http clientrequest. Such potentially malicious header injection URLs now cause anhttp.client.InvalidURL exception to be raised.
Tests¶
Python 3.5.7 final¶
Release date: 2019-03-17
Security¶
- bpo-36216: Changes urlsplit() to raise ValueError when the URL containscharacters that decompose under IDNA encoding (NFKC-normalization) intocharacters that affect how the URL is parsed.
- bpo-35121: Don’t send cookies of domain A without Domain attribute todomain B when domain A is a suffix match of domain B while using acookiejar with
http.cookiejar.DefaultCookiePolicypolicy. Patchby Karthikeyan Singaravelan.
Python 3.5.7 release candidate 1¶
Release date: 2019-03-03
Security¶
- bpo-35746: [CVE-2019-5010] Fix a NULL pointer deref in ssl module. Thecert parser did not handle CRL distribution points with empty DP or URIcorrectly. A malicious or buggy certificate can result into segfault.Vulnerability (TALOS-2018-0758) reported by Colin Read and Nicolas Edet ofCisco.
- bpo-34791: The xml.sax and xml.dom.domreg no longer use environmentvariables to override parser implementations whensys.flags.ignore_environment is set by -E or -I arguments.
- bpo-34623: CVE-2018-14647: The C accelerated _elementtree module nowinitializes hash randomization salt from _Py_HashSecret instead oflibexpat’s default CSPRNG.
Python 3.5.6 release candidate 1¶
Release date: 2018-07-19
Security¶
- bpo-33001: Minimal fix to prevent buffer overrun in os.symlink on Windows
- bpo-32981: Regexes in difflib and poplib were vulnerable to catastrophicbacktracking. These regexes formed potential DOS vectors (REDOS). Theyhave been refactored. This resolves CVE-2018-1060 and CVE-2018-1061. Patchby Jamie Davis.
Python 3.5.5 release candidate 1¶
Release date: 2018-01-23
Security¶
bpo-32551: The
sys.path[0]initialization change forbpo-29139 causeda regression by revealing an inconsistency in how sys.path is initializedwhen executing__main__from a zipfile, directory, or other importlocation. This is considered a potential security issue, as it may lead toprivileged processes unexpectedly loading code from user controlleddirectories in situations where that was not previously the case.The interpreter now consistently avoids ever adding the import location’sparent directory to
sys.path, and ensures no othersys.pathentries are inadvertently modified when inserting the import locationnamed on the command line. (Originally reported asbpo-29723 againstPython 3.6rc1, but it was missed at the time that the then upcoming Python3.5.4 release would also be affected)bpo-30657: Fixed possible integer overflow in PyBytes_DecodeEscape,CVE-2017-1000158. Original patch by Jay Bosamiya; rebased to Python 3 byMiro Hrončok.
bpo-30947: Upgrade libexpat embedded copy from version 2.2.1 to 2.2.3 toget security fixes.
Core and Builtins¶
- bpo-31095: Fix potential crash during GC caused by
tp_deallocwhichdoesn’t callPyObject_GC_UnTrack().
Library¶
- bpo-32072: Fixed issues with binary plists:
- Fixed saving bytearrays.
- Identical objects will be saved only once.
- Equal references will be load as identical objects.
- Added support for saving and loading recursive data structures.
- bpo-31170: expat: Update libexpat from 2.2.3 to 2.2.4. Fix copying ofpartial characters for UTF-8 input (libexpat bug 115):https://github.com/libexpat/libexpat/issues/115
Python 3.5.4 final¶
Release date: 2017-08-07
Python 3.5.4 release candidate 1¶
Release date: 2017-07-23
Security¶
- bpo-30730: Prevent environment variables injection in subprocess onWindows. Prevent passing other environment variables and commandarguments.
- bpo-30694: Upgrade expat copy from 2.2.0 to 2.2.1 to get fixes of multiplesecurity vulnerabilities including: CVE-2017-9233 (External entityinfinite loop DoS), CVE-2016-9063 (Integer overflow, re-fix),CVE-2016-0718 (Fix regression bugs from 2.2.0’s fix to CVE-2016-0718) andCVE-2012-0876 (Counter hash flooding with SipHash). Note: theCVE-2016-5300 (Use os- specific entropy sources like getrandom) doesn’timpact Python, since Python already gets entropy from the OS to set theexpat secret using
XML_SetHashSalt(). - bpo-30500: Fix urllib.parse.splithost() to correctly parse fragments. Forexample,
splithost('//127.0.0.1#@evil.com/')now correctly returns the127.0.0.1host, instead of treating@evil.comas the host in anauthentification (login@host). - bpo-29591: Update expat copy from 2.1.1 to 2.2.0 to get fixes ofCVE-2016-0718 and CVE-2016-4472. Seehttps://sourceforge.net/p/expat/bugs/537/ for more information.
Core and Builtins¶
- bpo-30876: Relative import from unloaded package now reimports the packageinstead of failing with SystemError. Relative import from non-package nowfails with ImportError rather than SystemError.
- bpo-30765: Avoid blocking in pthread_mutex_lock() whenPyThread_acquire_lock() is asked not to block.
- bpo-27945: Fixed various segfaults with dict when input collections aremutated during searching, inserting or comparing. Based on patches byDuane Griffin and Tim Mitchell.
- bpo-25794: Fixed type.__setattr__() and type.__delattr__() fornon-interned attribute names. Based on patch by Eryk Sun.
- bpo-29935: Fixed error messages in the index() method of tuple, list anddeque when pass indices of wrong type.
- bpo-28876:
bool(range)works even iflen(range)raisesOverflowError. - bpo-29600: Fix wrapping coroutine return values in StopIteration.
- bpo-29537: Restore runtime compatibility with bytecode files generated byCPython 3.5.0 to 3.5.2, and adjust the eval loop to avoid the problemsthat could be caused by the malformed variant of theBUILD_MAP_UNPACK_WITH_CALL opcode that they may contain. Patch by PetrViktorin, Serhiy Storchaka, and Nick Coghlan.
- bpo-28598: Support __rmod__ for subclasses of str being called beforestr.__mod__. Patch by Martijn Pieters.
- bpo-29602: Fix incorrect handling of signed zeros in complex constructorfor complex subclasses and for inputs having a __complex__ method. Patchby Serhiy Storchaka.
- bpo-29347: Fixed possibly dereferencing undefined pointers when creatingweakref objects.
- bpo-29438: Fixed use-after-free problem in key sharing dict.
- bpo-29319: Prevent RunMainFromImporter overwriting sys.path[0].
- bpo-29337: Fixed possible BytesWarning when compare the code objects.Warnings could be emitted at compile time.
- bpo-29478: If max_line_length=None is specified while using the Compat32policy, it is no longer ignored. Patch by Mircea Cosbuc.
Library¶
bpo-29403: Fix
unittest.mock’s autospec to not fail on method-boundbuiltin functions. Patch by Aaron Gallagher.bpo-30961: Fix decrementing a borrowed reference in tracemalloc.
bpo-30886: Fix multiprocessing.Queue.join_thread(): it now waits until thethread completes, even if the thread was started by the same process whichcreated the queue.
bpo-29854: Fix segfault in readline when using readline’s history-sizeoption. Patch by Nir Soffer.
bpo-30807: signal.setitimer() may disable the timer when passed a tinyvalue.
Tiny values (such as 1e-6) are valid non-zero values for setitimer(),which is specified as taking microsecond-resolution intervals. However, onsome platform, our conversion routine could convert 1e-6 into a zerointerval, therefore disabling the timer instead of (re-)scheduling it.
bpo-30441: Fix bug when modifying os.environ while iterating over it
bpo-30532: Fix email header value parser dropping folding white space incertain cases.
bpo-29169: Update zlib to 1.2.11.
bpo-30879: os.listdir() and os.scandir() now emit bytes names when calledwith bytes- like argument.
bpo-30746: Prohibited the ‘=’ character in environment variable names in
os.putenv()andos.spawn*().bpo-29755: Fixed the lgettext() family of functions in the gettext module.They now always return bytes.
bpo-30645: Fix path calculation in imp.load_package(), fixing it for caseswhen a package is only shipped with bytecodes. Patch by AlexandruArdelean.
bpo-23890: unittest.TestCase.assertRaises() now manually breaks areference cycle to not keep objects alive longer than expected.
bpo-30149: inspect.signature() now supports callables withvariable-argument parameters wrapped with partialmethod. Patch by Dong-heeNa.
bpo-29931: Fixed comparison check for ipaddress.ip_interface objects.Patch by Sanjay Sundaresan.
bpo-24484: Avoid race condition in multiprocessing cleanup.
bpo-28994: The traceback no longer displayed for SystemExit raised in acallback registered by atexit.
bpo-30508: Don’t log exceptions if Task/Future “cancel()” method wascalled.
bpo-28556: Updates to typing module: Add generic AsyncContextManager, addsupport for ContextManager on all versions. Original PRs by Jelle Zijlstraand Ivan Levkivskyi
bpo-29870: Fix ssl sockets leaks when connection is aborted in asyncio/sslimplementation. Patch by Michaël Sghaïer.
bpo-29743: Closing transport during handshake process leaks open socket.Patch by Nikolay Kim
bpo-27585: Fix waiter cancellation in asyncio.Lock. Patch by MathieuSornay.
bpo-30418: On Windows, subprocess.Popen.communicate() now also ignoreEINVAL on stdin.write() if the child process is still running but closedthe pipe.
bpo-30378: Fix the problem that logging.handlers.SysLogHandler cannothandle IPv6 addresses.
bpo-29960: Preserve generator state when _random.Random.setstate() raisesan exception. Patch by Bryan Olson.
bpo-30414: multiprocessing.Queue._feed background running thread do notbreak from main loop on exception.
bpo-30003: Fix handling escape characters in HZ codec. Based on patch byMa Lin.
bpo-30301: Fix AttributeError when using SimpleQueue.empty() underspawnandforkserver start methods.
bpo-30329: imaplib and poplib now catch the Windows socket WSAEINVAL error(code 10022) on shutdown(SHUT_RDWR): An invalid operation was attempted.This error occurs sometimes on SSL connections.
bpo-30375: Warnings emitted when compile a regular expression now alwayspoint to the line in the user code. Previously they could point intoinners of the re module if emitted from inside of groups or conditionals.
bpo-30048: Fixed
Task.cancel()can be ignored when the task is runningcoroutine and the coroutine returned without any moreawait.bpo-29990: Fix range checking in GB18030 decoder. Original patch by MaLin.
bpo-26293: Change resulted because of zipfile breakage. (See also:bpo-29094)
bpo-30243: Removed the __init__ methods of _json’s scanner and encoder.Misusing them could cause memory leaks or crashes. Now scanner andencoder objects are completely initialized in the __new__ methods.
bpo-30185: Avoid KeyboardInterrupt tracebacks in forkserver helper processwhen Ctrl-C is received.
bpo-28556: Various updates to typing module: add typing.NoReturn type, useWrapperDescriptorType, minor bug-fixes. Original PRs by Jim Fasarakis-Hilliard and Ivan Levkivskyi.
bpo-30205: Fix getsockname() for unbound AF_UNIX sockets on Linux.
bpo-30070: Fixed leaks and crashes in errors handling in the parsermodule.
bpo-30061: Fixed crashes in IOBase methods __next__() and readlines() whenreadline() or __next__() respectively return non-sizeable object. Fixedpossible other errors caused by not checking results of PyObject_Size(),PySequence_Size(), or PyMapping_Size().
bpo-30068: _io._IOBase.readlines will check if it’s closed first when hintis present.
bpo-29694: Fixed race condition in pathlib mkdir with flags parents=True.Patch by Armin Rigo.
bpo-29692: Fixed arbitrary unchaining of RuntimeError exceptions incontextlib.contextmanager. Patch by Siddharth Velankar.
bpo-29998: Pickling and copying ImportError now preserves name and pathattributes.
bpo-29942: Fix a crash in itertools.chain.from_iterable when encounteringlong runs of empty iterables.
bpo-27863: Fixed multiple crashes in ElementTree caused by race conditionsand wrong types.
bpo-28699: Fixed a bug in pools in multiprocessing.pool that raising anexception at the very first of an iterable may swallow the exception ormake the program hang. Patch by Davin Potts and Xiang Zhang.
bpo-25803: Avoid incorrect errors raised by Path.mkdir(exist_ok=True) whenthe OS gives priority to errors such as EACCES over EEXIST.
bpo-29861: Release references to tasks, their arguments and their resultsas soon as they are finished in multiprocessing.Pool.
bpo-29884: faulthandler: Restore the old sigaltstack during teardown.Patch by Christophe Zeitouny.
bpo-25455: Fixed crashes in repr of recursive buffered file-like objects.
bpo-29800: Fix crashes in partial.__repr__ if the keys of partial.keywordsare not strings. Patch by Michael Seifert.
bpo-29742: get_extra_info() raises exception if get called on closed ssltransport. Patch by Nikolay Kim.
bpo-8256: Fixed possible failing or crashing input() if attributes“encoding” or “errors” of sys.stdin or sys.stdout are not set or are notstrings.
bpo-28298: Fix a bug that prevented array ‘Q’, ‘L’ and ‘I’ from acceptingbig intables (objects that have __int__) as elements. Patch by OrenMilman.
bpo-29615: SimpleXMLRPCDispatcher no longer chains KeyError (or any otherexception) to exception(s) raised in the dispatched methods. Patch by PetrMotejlek.
bpo-29704: asyncio.subprocess.SubprocessStreamProtocol no longer closesbefore all pipes are closed.
bpo-29703: Fix asyncio to support instantiation of new event loops inchild processes.
bpo-29376: Fix assertion error in threading._DummyThread.is_alive().
bpo-29110: Fix file object leak in aifc.open() when file is given as afilesystem path and is not in valid AIFF format. Patch by Anthony Zhang.
bpo-28961: Fix unittest.mock._Call helper: don’t ignore the name parameteranymore. Patch written by Jiajun Huang.
bpo-29532: Altering a kwarg dictionary passed to functools.partial() nolonger affects a partial object after creation.
bpo-28556: Various updates to typing module: typing.Counter,typing.ChainMap, improved ABC caching, etc. Original PRs by JelleZijlstra, Ivan Levkivskyi, Manuel Krebber, and Łukasz Langa.
bpo-29100: Fix datetime.fromtimestamp() regression introduced in Python3.6.0: check minimum and maximum years.
bpo-29519: Fix weakref spewing exceptions during interpreter shutdown whenused with a rare combination of multiprocessing and custom codecs.
bpo-29416: Prevent infinite loop in pathlib.Path.mkdir
bpo-29444: Fixed out-of-bounds buffer access in the group() method of thematch object. Based on patch by WGH.
bpo-29335: Fix subprocess.Popen.wait() when the child process has exitedto a stopped instead of terminated state (ex: when under ptrace).
bpo-29290: Fix a regression in argparse that help messages would wrap atnon-breaking spaces.
bpo-28735: Fixed the comparison of mock.MagickMock with mock.ANY.
bpo-29011: Fix an important omission by adding Deque to the typing module.
bpo-29219: Fixed infinite recursion in the repr of uninitializedctypes.CDLL instances.
bpo-28969: Fixed race condition in C implementation offunctools.lru_cache. KeyError could be raised when cached function withfull cache was simultaneously called from differen threads with the sameuncached arguments.
bpo-29142: In urllib.request, suffixes in no_proxy environment variablewith leading dots could match related hostnames again (e.g. .b.c matchesa.b.c). Patch by Milan Oberkirch.
Documentation¶
- bpo-30176: Add missing attribute related constants in cursesdocumentation.
- bpo-26985: Add missing info of code object in inspect documentation.
- bpo-28929: Link the documentation to its source file on GitHub.
- bpo-25008: Document smtpd.py as effectively deprecated and add a pointerto aiosmtpd, a third-party asyncio-based replacement.
- bpo-26355: Add canonical header link on each page to corresponding majorversion of the documentation. Patch by Matthias Bussonnier.
- bpo-29349: Fix Python 2 syntax in code for building the documentation.
Tests¶
bpo-30822: Fix regrtest command line parser to allow passing -uextralargefile to run test_zipfile64.
bpo-30383: regrtest: Enhance regrtest and backport features from themaster branch.
Add options: –coverage, –testdir, –list-tests (list test files, don’trun them), –list-cases (list test identifiers, don’t run them,bpo-30523), –matchfile (load a list of test filters from a textfile,bpo-30540), –slowest (alias to –slow).
Enhance output: add timestamp, test result, currently running tests,“Tests result: xxx” summary with total duration, etc.
Fix reference leak hunting in regrtest, –huntrleaks: regrtest now warmsup caches, create explicitly all internal singletons which are created ondemand to prevent false positives when checking for reference leaks.(bpo-30675).
bpo-30357: test_thread: setUp() now uses support.threading_setup() andsupport.threading_cleanup() to wait until threads complete to avoid randomside effects on following tests. Initial patch written by GrzegorzGrzywacz.
bpo-28087: Skip test_asyncore and test_eintr poll failures on macOS. Skipsome tests of select.poll when running on macOS due to unresolved issueswith the underlying system poll function on some macOS versions.
bpo-30197: Enhanced functions swap_attr() and swap_item() in thetest.support module. They now work when delete replaced attribute or iteminside the with statement. The old value of the attribute or item (orNone if it doesn’t exist) now will be assigned to the target of the “as”clause, if there is one.
bpo-29571: to match the behaviour of the
re.LOCALEflag,test_re.test_locale_flag now useslocale.getpreferredencoding(False)to determine the candidate encoding for the test regex (allowing it tocorrectly skip the test when the default locale encoding is a multi-byteencoding)
Build¶
- bpo-29243: Prevent unnecessary rebuilding of Python during
maketest,makeinstalland some other make targets when configured with--enable-optimizations. - bpo-23404: Don’t regenerate generated files based on file modificationtime anymore: the action is now explicit. Replace
maketouchwithmakeregen-all. - bpo-29643: Fix
--enable-optimizationdidn’t work.
Windows¶
C API¶
- bpo-27867: Function PySlice_GetIndicesEx() is replaced with a macro ifPy_LIMITED_API is set to the value between 0x03050400 and 0x03060000 (notincluding) or 0x03060100 or higher.
- bpo-29083: Fixed the declaration of some public API functions.PyArg_VaParse() and PyArg_VaParseTupleAndKeywords() were not available inlimited API. PyArg_ValidateKeywordArguments(), PyArg_UnpackTuple() andPy_BuildValue() were not available in limited API of version < 3.3 whenPY_SSIZE_T_CLEAN is defined.
Python 3.5.3 final¶
Release date: 2017-01-17
There were no code changes between 3.5.3rc1 and 3.5.3 final.
Python 3.5.3 release candidate 1¶
Release date: 2017-01-02
Core and Builtins¶
- bpo-29073: bytearray formatting no longer truncates on first null byte.
- bpo-28932: Do not include <sys/random.h> if it does not exist.
- bpo-28147: Fix a memory leak in split-table dictionaries: setattr() mustnot convert combined table into split table.
- bpo-25677: Correct the positioning of the syntax error caret for indentedblocks. Based on patch by Michael Layzell.
- bpo-29000: Fixed bytes formatting of octals with zero padding in alternateform.
- bpo-28512: Fixed setting the offset attribute of SyntaxError byPyErr_SyntaxLocationEx() and PyErr_SyntaxLocationObject().
- bpo-28991: functools.lru_cache() was susceptible to an obscure reentrancybug caused by a monkey-patched len() function.
- bpo-28648: Fixed crash in Py_DecodeLocale() in debug build on Mac OS Xwhen decode astral characters. Patch by Xiang Zhang.
- bpo-19398: Extra slash no longer added to sys.path components in case ofempty compile- time PYTHONPATH components.
- bpo-28426: Fixed potential crash in PyUnicode_AsDecodedObject() in debugbuild.
- bpo-23782: Fixed possible memory leak in _PyTraceback_Add() and exceptionloss in PyTraceBack_Here().
- bpo-28379: Added sanity checks and tests for PyUnicode_CopyCharacters().Patch by Xiang Zhang.
- bpo-28376: The type of long range iterator is now registered as Iterator.Patch by Oren Milman.
- bpo-28376: The constructor of range_iterator now checks that step is not0. Patch by Oren Milman.
- bpo-26906: Resolving special methods of uninitialized type now causesimplicit initialization of the type instead of a fail.
- bpo-18287: PyType_Ready() now checks that tp_name is not NULL. Originalpatch by Niklas Koep.
- bpo-24098: Fixed possible crash when AST is changed in process ofcompiling it.
- bpo-28350: String constants with null character no longer interned.
- bpo-26617: Fix crash when GC runs during weakref callbacks.
- bpo-27942: String constants now interned recursively in tuples andfrozensets.
- bpo-21578: Fixed misleading error message when ImportError called withinvalid keyword args.
- bpo-28203: Fix incorrect type in error message from
complex(1.0,{2:3}). Patch by Soumya Sharma. - bpo-27955: Fallback on reading /dev/urandom device when the getrandom()syscall fails with EPERM, for example when blocked by SECCOMP.
- bpo-28131: Fix a regression in zipimport’s compile_source(). zipimportshould use the same optimization level as the interpreter.
- bpo-25221: Fix corrupted result from PyLong_FromLong(0) when Python iscompiled with NSMALLPOSINTS = 0.
- bpo-25758: Prevents zipimport from unnecessarily encoding a filename(patch by Eryk Sun)
- bpo-28189: dictitems_contains no longer swallows compare errors. (Patch byXiang Zhang)
- bpo-27812: Properly clear out a generator’s frame’s backreference to thegenerator to prevent crashes in frame.clear().
- bpo-27811: Fix a crash when a coroutine that has not been awaited isfinalized with warnings-as-errors enabled.
- bpo-27587: Fix another issue found by PVS-Studio: Null pointer check afteruse of ‘def’ in _PyState_AddModule(). Initial patch by Christian Heimes.
- bpo-26020: set literal evaluation order did not match documentedbehaviour.
- bpo-27782: Multi-phase extension module import now correctly allows the
m_methodsfield to be used to add module level functions to instancesof non-module types returned fromPy_create_mod. Patch by Xiang Zhang. - bpo-27936: The round() function accepted a second None argument for sometypes but not for others. Fixed the inconsistency by accepting None forall numeric types.
- bpo-27487: Warn if a submodule argument to “python -m” orrunpy.run_module() is found in sys.modules after parent packages areimported, but before the submodule is executed.
- bpo-27558: Fix a SystemError in the implementation of “raise” statement.In a brand new thread, raise a RuntimeError since there is no activeexception to reraise. Patch written by Xiang Zhang.
- bpo-27419: Standard __import__() no longer look up “__import__” in globalsor builtins for importing submodules or “from import”. Fixed handling anerror of non- string package name.
- bpo-27083: Respect the PYTHONCASEOK environment variable under Windows.
- bpo-27514: Make having too many statically nested blocks a SyntaxErrorinstead of SystemError.
- bpo-27473: Fixed possible integer overflow in bytes and bytearrayconcatenations. Patch by Xiang Zhang.
- bpo-27507: Add integer overflow check in bytearray.extend(). Patch byXiang Zhang.
- bpo-27581: Don’t rely on wrapping for overflow check inPySequence_Tuple(). Patch by Xiang Zhang.
- bpo-27443: __length_hint__() of bytearray iterators no longer return anegative integer for a resized bytearray.
- bpo-27942: Fix memory leak in codeobject.c
Library¶
bpo-15812: inspect.getframeinfo() now correctly shows the first line of acontext. Patch by Sam Breese.
bpo-29094: Offsets in a ZIP file created with extern file object and modes“w” and “x” now are relative to the start of the file.
bpo-13051: Fixed recursion errors in large or resizedcurses.textpad.Textbox. Based on patch by Tycho Andersen.
bpo-29119: Fix weakrefs in the pure python version ofcollections.OrderedDict move_to_end() method. Contributed by AndraBogildea.
bpo-9770: curses.ascii predicates now work correctly with negativeintegers.
bpo-28427: old keys should not remove new values from WeakValueDictionarywhen collecting from another thread.
bpo-28923: Remove editor artifacts from Tix.py.
bpo-28871: Fixed a crash when deallocate deep ElementTree.
bpo-19542: Fix bugs in WeakValueDictionary.setdefault() andWeakValueDictionary.pop() when a GC collection happens in another thread.
bpo-20191: Fixed a crash in resource.prlimit() when pass a sequence thatdoesn’t own its elements as limits.
bpo-28779: multiprocessing.set_forkserver_preload() would crash theforkserver process if a preloaded module instantiated some multiprocessingobjects such as locks.
bpo-28847: dbm.dumb now supports reading read-only files and no longerwrites the index file when it is not changed.
bpo-25659: In ctypes, prevent a crash calling the from_buffer() andfrom_buffer_copy() methods on abstract classes like Array.
bpo-28732: Fix crash in os.spawnv() with no elements in args
bpo-28485: Always raise ValueError for negativecompileall.compile_dir(workers=…) parameter, even when multithreading isunavailable.
bpo-28387: Fixed possible crash in _io.TextIOWrapper deallocator when thegarbage collector is invoked in other thread. Based on patch by SebastianCufre.
bpo-27517: LZMA compressor and decompressor no longer raise exceptions ifgiven empty data twice. Patch by Benjamin Fogle.
bpo-28549: Fixed segfault in curses’s addch() with ncurses6.
bpo-28449: tarfile.open() with mode “r” or “r:” now tries to open a tarfile with compression before trying to open it without compression.Otherwise it had 50% chance failed with ignore_zeros=True.
bpo-23262: The webbrowser module now supports Firefox 36+ and derivedbrowsers. Based on patch by Oleg Broytman.
bpo-27939: Fixed bugs in tkinter.ttk.LabeledScale and tkinter.Scale causedby representing the scale as float value internally in Tk. tkinter.IntVarnow works if float value is set to underlying Tk variable.
bpo-28255: calendar.TextCalendar().prmonth() no longer prints a space atthe start of new line after printing a month’s calendar. Patch by XiangZhang.
bpo-20491: The textwrap.TextWrapper class now honors non-breaking spaces.Based on patch by Kaarle Ritvanen.
bpo-28353: os.fwalk() no longer fails on broken links.
bpo-25464: Fixed HList.header_exists() in tkinter.tix module by addin aworkaround to Tix library bug.
bpo-28488: shutil.make_archive() no longer add entry “./” to ZIP archive.
bpo-24452: Make webbrowser support Chrome on Mac OS X.
bpo-20766: Fix references leaked by pdb in the handling of SIGINThandlers.
bpo-26293: Fixed writing ZIP files that starts not from the start of thefile. Offsets in ZIP file now are relative to the start of the archive inconforming to the specification.
bpo-28321: Fixed writing non-BMP characters with binary format inplistlib.
bpo-28322: Fixed possible crashes when unpickle itertools objects fromincorrect pickle data. Based on patch by John Leitch.
Fix possible integer overflows and crashes in the mmap module with unusualusage patterns.
bpo-1703178: Fix the ability to pass the –link-objects option to thedistutils build_ext command.
bpo-28253: Fixed calendar functions for extreme months: 0001-01 and9999-12.
Methods itermonthdays() and itermonthdays2() are reimplemented so thatthey don’t call itermonthdates() which can cause datetime.dateunder/overflow.
bpo-28275: Fixed possible use after free in the decompress() methods ofthe LZMADecompressor and BZ2Decompressor classes. Original patch by JohnLeitch.
bpo-27897: Fixed possible crash in sqlite3.Connection.create_collation()if pass invalid string-like object as a name. Patch by Xiang Zhang.
bpo-18893: Fix invalid exception handling in Lib/ctypes/macholib/dyld.py.Patch by Madison May.
bpo-27611: Fixed support of default root window in the tkinter.tix module.
bpo-27348: In the traceback module, restore the formatting of exceptionmessages like “Exception: None”. This fixes a regression introduced in3.5a2.
bpo-25651: Allow falsy values to be used for msg parameter of subTest().
bpo-27932: Prevent memory leak in win32_ver().
Fix UnboundLocalError in socket._sendfile_use_sendfile.
bpo-28075: Check for ERROR_ACCESS_DENIED in Windows implementation ofos.stat(). Patch by Eryk Sun.
bpo-25270: Prevent codecs.escape_encode() from raising SystemError when anempty bytestring is passed.
bpo-28181: Get antigravity over HTTPS. Patch by Kaartic Sivaraam.
bpo-25895: Enable WebSocket URL schemes in urllib.parse.urljoin. Patch byGergely Imreh and Markus Holtermann.
bpo-27599: Fixed buffer overrun in binascii.b2a_qp() andbinascii.a2b_qp().
bpo-19003: m email.generator now replaces only
\rand/or\nlineendings, per the RFC, instead of all unicode line endings.bpo-28019: itertools.count() no longer rounds non-integer step in rangebetween 1.0 and 2.0 to 1.
bpo-25969: Update the lib2to3 grammar to handle the unpackinggeneralizations added in 3.5.
bpo-14977: mailcap now respects the order of the lines in the mailcapfiles (“first match”), as required by RFC 1542. Patch by Michael Lazar.
bpo-24594: Validates persist parameter when opening MSI database
bpo-17582: xml.etree.ElementTree nows preserves whitespaces in attributes(Patch by Duane Griffin. Reviewed and approved by Stefan Behnel.)
bpo-28047: Fixed calculation of line length used for the base64 CTE in thenew email policies.
bpo-27445: Don’t pass str(_charset) to MIMEText.set_payload(). Patch byClaude Paroz.
bpo-22450: urllib now includes an
Accept:*/*header among the defaultheaders. This makes the results of REST API requests more consistent andpredictable especially when proxy servers are involved.lib2to3.pgen3.driver.load_grammar() now creates a stable cache filebetween runs given the same Grammar.txt input regardless of the hashrandomization setting.
bpo-27570: Avoid zero-length memcpy() etc calls with null source pointersin the “ctypes” and “array” modules.
bpo-22233: Break email header linesonly on the RFC specified CR and LFcharacters, not on arbitrary unicode line breaks. This also fixes a bugin HTTP header parsing.
bpo-27988: Fix email iter_attachments incorrect mutation of payload list.
bpo-27691: Fix ssl module’s parsing of GEN_RID subject alternative namefields in X.509 certs.
bpo-27850: Remove 3DES from ssl module’s default cipher list to countermeasure sweet32 attack (CVE-2016-2183).
bpo-27766: Add ChaCha20 Poly1305 to ssl module’s default ciper list.(Required OpenSSL 1.1.0 or LibreSSL).
bpo-26470: Port ssl and hashlib module to OpenSSL 1.1.0.
Remove support for passing a file descriptor to os.access. It never workedbut previously didn’t raise.
bpo-12885: Fix error when distutils encounters symlink.
bpo-27881: Fixed possible bugs when settingsqlite3.Connection.isolation_level. Based on patch by Xiang Zhang.
bpo-27861: Fixed a crash in sqlite3.Connection.cursor() when a factorycreates not a cursor. Patch by Xiang Zhang.
bpo-19884: Avoid spurious output on OS X with Gnu Readline.
bpo-27706: Restore deterministic behavior of random.Random().seed() forstring seeds using seeding version 1. Allows sequences of calls torandom() to exactly match those obtained in Python 2. Patch by NofarSchnider.
bpo-10513: Fix a regression in Connection.commit(). Statements should notbe reset after a commit.
A new version of typing.py fromhttps://github.com/python/typing: -Collection (only for 3.6) (bpo-27598) - Add FrozenSet to __all__(upstream #261) - fix crash in _get_type_vars() (upstream #259) - Removethe dict constraint in ForwardRef._eval_type (upstream #252)
bpo-27539: Fix unnormalised
Fraction.__pow__result in the case ofnegative exponent and negative base.bpo-21718: cursor.description is now available for queries using CTEs.
bpo-2466: posixpath.ismount now correctly recognizes mount points whichthe user does not have permission to access.
bpo-27773: Correct some memory management errors server_hostname in_ssl.wrap_socket().
bpo-26750: unittest.mock.create_autospec() now works properly forsubclasses of property() and other data descriptors.
In the curses module, raise an error if window.getstr() or window.instr()is passed a negative value.
bpo-27783: Fix possible usage of uninitialized memory inoperator.methodcaller.
bpo-27774: Fix possible Py_DECREF on unowned object in _sre.
bpo-27760: Fix possible integer overflow in binascii.b2a_qp.
bpo-27758: Fix possible integer overflow in the _csv module for largerecord lengths.
bpo-27568: Prevent HTTPoxy attack (CVE-2016-1000110). Ignore theHTTP_PROXY variable when REQUEST_METHOD environment is set, whichindicates that the script is in CGI mode.
bpo-27656: Do not assume sched.h defines any SCHED_* constants.
bpo-27130: In the “zlib” module, fix handling of large buffers (typically4 GiB) when compressing and decompressing. Previously, inputs werelimited to 4 GiB, and compression and decompression operations did notproperly handle results of 4 GiB.
bpo-27533: Release GIL in nt._isdir
bpo-17711: Fixed unpickling by the persistent ID with protocol 0. Originalpatch by Alexandre Vassalotti.
bpo-27522: Avoid an unintentional reference cycle in email.feedparser.
bpo-26844: Fix error message for imp.find_module() to refer to ‘path’instead of ‘name’. Patch by Lev Maximov.
bpo-23804: Fix SSL zero-length recv() calls to not block and not raise anerror about unclean EOF.
bpo-27466: Change time format returned by http.cookie.time2netscape,confirming the netscape cookie format and making it consistent withdocumentation.
bpo-26664: Fix activate.fish by removing mis-use of
$.bpo-22115: Fixed tracing Tkinter variables: trace_vdelete() with wrongmode no longer break tracing, trace_vinfo() now always returns a list ofpairs of strings, tracing in the “u” mode now works.
Fix a scoping issue in importlib.util.LazyLoader which triggered anUnboundLocalError when lazy-loading a module that was already put intosys.modules.
bpo-27079: Fixed curses.ascii functions isblank(), iscntrl() andispunct().
bpo-26754: Some functions (compile() etc) accepted a filename argumentencoded as an iterable of integers. Now only strings and byte-like objectsare accepted.
bpo-27048: Prevents distutils failing on Windows when environmentvariables contain non-ASCII characters
bpo-27330: Fixed possible leaks in the ctypes module.
bpo-27238: Got rid of bare excepts in the turtle module. Original patchby Jelle Zijlstra.
bpo-27122: When an exception is raised within the context being managed bya contextlib.ExitStack() and one of the exit stack generators catches andraises it in a chain, do not re-raise the original exception when exiting,let the new chained one through. This avoids the PEP 479 bug described inissue25782.
Security¶
- bpo-27278: Fix os.urandom() implementation using getrandom() on Linux.Truncate size to INT_MAX and loop until we collected enough random bytes,instead of casting a directly Py_ssize_t to int.
Library¶
- bpo-16182: Fix various functions in the “readline” module to use thelocale encoding, and fix get_begidx() and get_endidx() to return codepoint indexes.
- bpo-27392: Add loop.connect_accepted_socket(). Patch by Jim Fulton.
- bpo-27930: Improved behaviour of logging.handlers.QueueListener. Thanks toPaulo Andrade and Petr Viktorin for the analysis and patch.
- bpo-21201: Improves readability of multiprocessing error message. Thanksto Wojciech Walczak for patch.
- bpo-27456: asyncio: Set TCP_NODELAY by default.
- bpo-27906: Fix socket accept exhaustion during high TCP traffic. Patch byKevin Conway.
- bpo-28174: Handle when SO_REUSEPORT isn’t properly supported. Patch bySeth Michael Larson.
- bpo-26654: Inspect functools.partial in asyncio.Handle.__repr__. Patch byiceboy.
- bpo-26909: Fix slow pipes IO in asyncio. Patch by INADA Naoki.
- bpo-28176: Fix callbacks race in asyncio.SelectorLoop.sock_connect.
- bpo-27759: Fix selectors incorrectly retain invalid file descriptors.Patch by Mark Williams.
- bpo-28368: Refuse monitoring processes if the child watcher has no loopattached. Patch by Vincent Michel.
- bpo-28369: Raise RuntimeError when transport’s FD is used with add_reader,add_writer, etc.
- bpo-28370: Speedup asyncio.StreamReader.readexactly. Patch by КоренбергМарк.
- bpo-28371: Deprecate passing asyncio.Handles to run_in_executor.
- bpo-28372: Fix asyncio to support formatting of non-python coroutines.
- bpo-28399: Remove UNIX socket from FS before binding. Patch by КоренбергМарк.
- bpo-27972: Prohibit Tasks to await on themselves.
- bpo-26923: Fix asyncio.Gather to refuse being cancelled once all childrenare done. Patch by Johannes Ebke.
- bpo-26796: Don’t configure the number of workers for default threadpoolexecutor. Initial patch by Hans Lawrenz.
- bpo-28600: Optimize loop.call_soon().
- bpo-28613: Fix get_event_loop() return the current loop if called fromcoroutines/callbacks.
- bpo-28639: Fix inspect.isawaitable to always return bool Patch by JustinMayfield.
- bpo-28652: Make loop methods reject socket kinds they do not support.
- bpo-28653: Fix a refleak in functools.lru_cache.
- bpo-28703: Fix asyncio.iscoroutinefunction to handle Mock objects.
- bpo-24142: Reading a corrupt config file left the parser in an invalidstate. Original patch by Florian Höch.
- bpo-28990: Fix SSL hanging if connection is closed before handshakecompleted. (Patch by HoHo-Ho)
IDLE¶
- bpo-15308: Add ‘interrupt execution’ (^C) to Shell menu. Patch by RogerSerwy, updated by Bayard Randel.
- bpo-27922: Stop IDLE tests from ‘flashing’ gui widgets on the screen.
- Add version to title of IDLE help window.
- bpo-25564: In section on IDLE – console differences, mention that usingexec means that __builtins__ is defined for each statement.
- bpo-27714: text_textview and test_autocomplete now pass when re-run in thesame process. This occurs when test_idle fails when run with the -woption but without -jn. Fix warning from test_config.
- bpo-25507: IDLE no longer runs buggy code because of its tkinter imports.Users must include the same imports required to run directly in Python.
- bpo-27452: add line counter and crc to IDLE configHandler test dump.
- bpo-27365: Allow non-ascii chars in IDLE NEWS.txt, for contributor names.
- bpo-27245: IDLE: Cleanly delete custom themes and key bindings.Previously, when IDLE was started from a console or by import, a cascadeof warnings was emitted. Patch by Serhiy Storchaka.
C API¶
Tests¶
- bpo-28950: Disallow -j0 to be combined with -T/-l/-M in regrtest commandline arguments.
- bpo-28666: Now test.support.rmtree is able to remove unwritable orunreadable directories.
- bpo-23839: Various caches now are cleared before running every test file.
- bpo-28409: regrtest: fix the parser of command line arguments.
- bpo-27787: Call gc.collect() before checking each test for “danglingthreads”, since the dangling threads are weak references.
- bpo-27369: In test_pyexpat, avoid testing an error message detail thatchanged in Expat 2.2.0.
Tools/Demos¶
- bpo-27952: Get Tools/scripts/fixcid.py working with Python 3 and thecurrent “re” module, avoid invalid Python backslash escapes, and fix a bugparsing escaped C quote signs.
- bpo-27332: Fixed the type of the first argument of module-level functionsgenerated by Argument Clinic. Patch by Petr Viktorin.
- bpo-27418: Fixed Tools/importbench/importbench.py.
Windows¶
- bpo-28251: Improvements to help manuals on Windows.
- bpo-28110: launcher.msi has different product codes between 32-bit and64-bit
- bpo-25144: Ensures TargetDir is set before continuing with custom install.
- bpo-27469: Adds a shell extension to the launcher so that drag and dropworks correctly.
- bpo-27309: Enabled proper Windows styles in python[w].exe manifest.
Build¶
- bpo-29080: Removes hard dependency on hg.exe from PCBuild/build.bat
- bpo-23903: Added missed names to PC/python3.def.
- bpo-10656: Fix out-of-tree building on AIX. Patch by Tristan Carel andMichael Haubenwallner.
- bpo-26359: Rename –with-optimiations to –enable-optimizations.
- bpo-28444: Fix missing extensions modules when cross compiling.
- bpo-28248: Update Windows build and OS X installers to use OpenSSL 1.0.2j.
- bpo-28258: Fixed build with Estonian locale (python-config and distcleantargets in Makefile). Patch by Arfrever Frehtes Taifersar Arahesis.
- bpo-26661: setup.py now detects system libffi with multiarch wrapper.
- bpo-28066: Fix the logic that searches build directories for generatedinclude files when building outside the source tree.
- bpo-15819: Remove redundant include search directory option for buildingoutside the source tree.
- bpo-27566: Fix clean target in freeze makefile (patch by Lisa Roach)
- bpo-27705: Update message in validate_ucrtbase.py
- bpo-27983: Cause lack of llvm-profdata tool when using clang as requiredfor PGO linking to be a configure time error rather than make time when–with- optimizations is enabled. Also improve our ability to find thellvm- profdata tool on MacOS and some Linuxes.
- bpo-26307: The profile-opt build now applies PGO to the built-in modules.
- bpo-26359: Add the –with-optimizations configure flag.
- bpo-27713: Suppress spurious build warnings when updating importlib’sbootstrap files. Patch by Xiang Zhang
- bpo-25825: Correct the references to Modules/python.exp and ld_so_aix,which are required on AIX. This updates references to an installationpath that was changed in 3.2a4, and undoes changed references to the buildtree that were made in 3.5.0a1.
- bpo-27453: CPP invocation in configure must use CPPFLAGS. Patch by ChiHsuan Yen.
- bpo-27641: The configure script now inserts comments into the makefile toprevent the pgen and _freeze_importlib executables from being cross-compiled.
- bpo-26662: Set PYTHON_FOR_GEN in configure as the Python program to beused for file generation during the build.
- bpo-10910: Avoid C++ compilation errors on FreeBSD and OS X. Also updateFreedBSD version checks for the original ctype UTF-8 workaround.
- bpo-28676: Prevent missing ‘getentropy’ declaration warning on macOS.Patch by Gareth Rees.
Python 3.5.2 final¶
Release date: 2016-06-26
Python 3.5.2 release candidate 1¶
Release date: 2016-06-12
Core and Builtins¶
- bpo-27066: Fixed SystemError if a custom opener (for open()) returns anegative number without setting an exception.
- bpo-20041: Fixed TypeError when frame.f_trace is set to None. Patch byXavier de Gaye.
- bpo-26168: Fixed possible refleaks in failing Py_BuildValue() with the “N”format unit.
- bpo-26991: Fix possible refleak when creating a function with annotations.
- bpo-27039: Fixed bytearray.remove() for values greater than 127. Patch byJoe Jevnik.
- bpo-23640: int.from_bytes() no longer bypasses constructors forsubclasses.
- bpo-26811: gc.get_objects() no longer contains a broken tuple with NULLpointer.
- bpo-20120: Use RawConfigParser for .pypirc parsing, removing support forinterpolation unintentionally added with move to Python 3. Behavior nolonger does any interpolation in .pypirc files, matching behavior inPython 2.7 and Setuptools 19.0.
- bpo-26659: Make the builtin slice type support cycle collection.
- bpo-26718: super.__init__ no longer leaks memory if called multiple times.NOTE: A direct call of super.__init__ is not endorsed!
- bpo-25339: PYTHONIOENCODING now has priority over locale in setting theerror handler for stdin and stdout.
- bpo-26494: Fixed crash on iterating exhausting iterators. Affected classesare generic sequence iterators, iterators of str, bytes, bytearray, list,tuple, set, frozenset, dict, OrderedDict, corresponding views andos.scandir() iterator.
- bpo-26581: If coding cookie is specified multiple times on a line inPython source code file, only the first one is taken to account.
- bpo-26464: Fix str.translate() when string is ASCII and first replacementsremoves character, but next replacement uses a non-ASCII character or astring longer than 1 character. Regression introduced in Python 3.5.0.
- bpo-22836: Ensure exception reports from PyErr_Display() andPyErr_WriteUnraisable() are sensible even when formatting them producessecondary errors. This affects the reports produced bysys.__excepthook__() and when __del__() raises an exception.
- bpo-26302: Correct behavior to reject comma as a legal character forcookie names.
- bpo-4806: Avoid masking the original TypeError exception when using star(
*) unpacking in function calls. Based on patch by Hagen Fürstenauand Daniel Urban. - bpo-27138: Fix the doc comment for FileFinder.find_spec().
- bpo-26154: Add a new private _PyThreadState_UncheckedGet() function to getthe current Python thread state, but don’t issue a fatal error if it isNULL. This new function must be used instead of accessing directly the_PyThreadState_Current variable. The variable is no more exposed sincePython 3.5.1 to hide the exact implementation of atomic C types, to avoidcompiler issues.
- bpo-26194: Deque.insert() gave odd results for bounded deques that hadreached their maximum size. Now an IndexError will be raised whenattempting to insert into a full deque.
- bpo-25843: When compiling code, don’t merge constants if they are equalbut have a different types. For example,
f1,f2=lambda:1,lambda:1.0is now correctly compiled to two different functions:f1()returns1(int) andf2()returns1.0(int), even if1and1.0are equal. - bpo-22995: [UPDATE] Comment out the one of the pickleability tests in_PyObject_GetState() due to regressions observed in Cython-based projects.
- bpo-25961: Disallowed null characters in the type name.
- bpo-25973: Fix segfault when an invalid nonlocal statement binds a namestarting with two underscores.
- bpo-22995: Instances of extension types with a state that aren’tsubclasses of list or dict and haven’t implemented any pickle-relatedmethods (__reduce__, __reduce_ex__, __getnewargs__, __getnewargs_ex__, or__getstate__), can no longer be pickled. Including memoryview.
- bpo-20440: Massive replacing unsafe attribute setting code with specialmacro Py_SETREF.
- bpo-25766: Special method __bytes__() now works in str subclasses.
- bpo-25421: __sizeof__ methods of builtin types now use dynamic basic size.This allows sys.getsize() to work correctly with their subclasses with__slots__ defined.
- bpo-25709: Fixed problem with in-place string concatenation and utf-8cache.
- bpo-27147: Mention PEP 420 in the importlib docs.
- bpo-24097: Fixed crash in object.__reduce__() if slot name is freed inside__getattr__.
- bpo-24731: Fixed crash on converting objects with special methods__bytes__, __trunc__, and __float__ returning instances of subclasses ofbytes, int, and float to subclasses of bytes, int, and floatcorrespondingly.
- bpo-26478: Fix semantic bugs when using binary operators with dictionaryviews and tuples.
- bpo-26171: Fix possible integer overflow and heap corruption inzipimporter.get_data().
- bpo-25660: Fix TAB key behaviour in REPL with readline.
- bpo-25887: Raise a RuntimeError when a coroutine object is awaited morethan once.
- bpo-27243: Update the __aiter__ protocol: instead of returning anawaitable that resolves to an asynchronous iterator, the asynchronousiterator should be returned directly. Doing the former will trigger aPendingDeprecationWarning.
Security¶
- bpo-26556: Update expat to 2.1.1, fixes CVE-2015-1283.
- Fix TLS stripping vulnerability in smtplib, CVE-2016-0772. Reported byTeam Oststrom
Library¶
- bpo-21386: Implement missing IPv4Address.is_global property. It wasdocumented since 07a5610bae9d. Initial patch by Roger Luethi.
- bpo-20900: distutils register command now decodes HTTP responsescorrectly. Initial patch by ingrid.
- A new version of typing.py provides several new classes and features:@overload outside stubs, Reversible, DefaultDict, Text, ContextManager,Type[], NewType(), TYPE_CHECKING, and numerous bug fixes (note that someof the new features are not yet implemented in mypy or other staticanalyzers). Also classes for PEP 492 (Awaitable, AsyncIterable,AsyncIterator) have been added (in fact they made it into 3.5.1 but werenever mentioned).
- bpo-25738: Stop http.server.BaseHTTPRequestHandler.send_error() fromsending a message body for 205 Reset Content. Also, don’t send Contentheader fields in responses that don’t have a body. Patch by SusumuKoshiba.
- bpo-21313: Fix the “platform” module to tolerate when sys.version containstruncated build information.
Security¶
- bpo-26839: On Linux,
os.urandom()now callsgetrandom()withGRND_NONBLOCKto fall back on reading/dev/urandomif the urandomentropy pool is not initialized yet. Patch written by Colm Buckley.
Library¶
bpo-27164: In the zlib module, allow decompressing raw Deflate streamswith a predefined zdict. Based on patch by Xiang Zhang.
bpo-24291: Fix wsgiref.simple_server.WSGIRequestHandler to completelywrite data to the client. Previously it could do partial writes andtruncate data. Also, wsgiref.handler.ServerHandler can now handle stdoutdoing partial writes, but this is deprecated.
bpo-26373: subprocess.Popen.communicate now correctly ignoresBrokenPipeError when the child process dies before .communicate() iscalled in more/all circumstances.
bpo-21776: distutils.upload now correctly handles HTTPError. Initial patchby Claudiu Popa.
bpo-27114: Fix SSLContext._load_windows_store_certs fails withPermissionError
bpo-18383: Avoid creating duplicate filters when using filterwarnings andsimplefilter. Based on patch by Alex Shkop.
bpo-27057: Fix os.set_inheritable() on Android, ioctl() is blocked bySELinux and fails with EACCESS. The function now falls back to fcntl().Patch written by Michał Bednarski.
bpo-27014: Fix infinite recursion using typing.py. Thanks to Kalle Tuure!
bpo-14132: Fix urllib.request redirect handling when the target only has aquery string. Original fix by Ján Janech.
bpo-17214: The “urllib.request” module now percent-encodes non-ASCII bytesfound in redirect target URLs. Some servers send Location header fieldswith non- ASCII bytes, but “http.client” requires the request target to beASCII- encodable, otherwise a UnicodeEncodeError is raised. Based onpatch by Christian Heimes.
bpo-26892: Honor debuglevel flag in urllib.request.HTTPHandler. Patchcontributed by Chi Hsuan Yen.
bpo-22274: In the subprocess module, allow stderr to be redirected tostdout even when stdout is not redirected. Patch by Akira Li.
bpo-26807: mock_open ‘files’ no longer error on readline at end of file.Patch from Yolanda Robla.
bpo-25745: Fixed leaking a userptr in curses panel destructor.
bpo-26977: Removed unnecessary, and ignored, call to sum of squares helperin statistics.pvariance.
bpo-26881: The modulefinder module now supports extended opcode arguments.
bpo-23815: Fixed crashes related to directly created instances of types in_tkinter and curses.panel modules.
bpo-17765: weakref.ref() no longer silently ignores keyword arguments.Patch by Georg Brandl.
bpo-26873: xmlrpc now raises ResponseError on unsupported type tagsinstead of silently return incorrect result.
bpo-26711: Fixed the comparison of plistlib.Data with other types.
bpo-24114: Fix an uninitialized variable in
ctypes.util.The bug only occurs on SunOS when the ctypes implementation searches forthe
crleprogram. Patch by Xiang Zhang. Tested on SunOS by Kees Bos.bpo-26864: In urllib.request, change the proxy bypass host checkingagainst no_proxy to be case-insensitive, and to not match unrelated hostnames that happen to have a bypassed hostname as a suffix. Patch by XiangZhang.
bpo-26634: recursive_repr() now sets __qualname__ of wrapper. Patch byXiang Zhang.
bpo-26804: urllib.request will prefer lower_case proxy environmentvariables over UPPER_CASE or Mixed_Case ones. Patch contributed byHans-Peter Jansen.
bpo-26837: assertSequenceEqual() now correctly outputs non-stringifieddiffering items (like bytes in the -b mode). This affectsassertListEqual() and assertTupleEqual().
bpo-26041: Remove “will be removed in Python 3.7” from deprecationmessages of platform.dist() and platform.linux_distribution(). Patch byKumaripaba Miyurusara Athukorala.
bpo-26822: itemgetter, attrgetter and methodcaller objects no longersilently ignore keyword arguments.
bpo-26733: Disassembling a class now disassembles class and staticmethods. Patch by Xiang Zhang.
bpo-26801: Fix error handling in
shutil.get_terminal_size(), catchAttributeErrorinstead ofNameError. Patch written byEmanuel Barry.bpo-24838: tarfile’s ustar and gnu formats now correctly calculate nameand link field limits for multibyte character encodings like utf-8.
Security¶
- bpo-26657: Fix directory traversal vulnerability with http.server onWindows. This fixes a regression that was introduced in 3.3.4rc1 and3.4.0rc1. Based on patch by Philipp Hagemeister.
Library¶
- bpo-26717: Stop encoding Latin-1-ized WSGI paths with UTF-8. Patch byAnthony Sottile.
- bpo-26735: Fix
os.urandom()on Solaris 11.3 and newer when readingmore than 1,024 bytes: callgetrandom()multiple times with a limit of1024 bytes per call. - bpo-16329: Add .webm to mimetypes.types_map. Patch by Giampaolo Rodola’.
- bpo-13952: Add .csv to mimetypes.types_map. Patch by Geoff Wilson.
- bpo-26709: Fixed Y2038 problem in loading binary PLists.
- bpo-23735: Handle terminal resizing with Readline 6.3+ by installing ourown SIGWINCH handler. Patch by Eric Price.
- bpo-26586: In http.server, respond with “413 Request header fields toolarge” if there are too many header fields to parse, rather than killingthe connection and raising an unhandled exception. Patch by Xiang Zhang.
- bpo-22854: Change BufferedReader.writable() and BufferedWriter.readable()to always return False.
- bpo-25195: Fix a regression in mock.MagicMock. _Call is a subclass oftuple (changeset 3603bae63c13 only works for classes) so we need toimplement __ne__ ourselves. Patch by Andrew Plummer.
- bpo-26644: Raise ValueError rather than SystemError when a negative lengthis passed to SSLSocket.recv() or read().
- bpo-23804: Fix SSL recv(0) and read(0) methods to return zero bytesinstead of up to 1024.
- bpo-26616: Fixed a bug in datetime.astimezone() method.
- bpo-21925:
warnings.formatwarning()now catches exceptions onlinecache.getline(...)to be able to logResourceWarningemitted late during the Python shutdown process. - bpo-24266: Ctrl+C during Readline history search now cancels the searchmode when compiled with Readline 7.
- bpo-26560: Avoid potential ValueError in BaseHandler.start_response.Initial patch by Peter Inglesby.
Security¶
- bpo-26313: ssl.py _load_windows_store_certs fails if windows cert store isempty. Patch by Baji.
Library¶
- bpo-26569: Fix
pyclbr.readmodule()andpyclbr.readmodule_ex()to support importing packages. - bpo-26499: Account for remaining Content-Length in HTTPResponse.readline()and read1(). Based on patch by Silent Ghost. Also document thatHTTPResponse now supports these methods.
- bpo-25320: Handle sockets in directories unittest discovery is scanning.Patch from Victor van den Elzen.
- bpo-16181: cookiejar.http2time() now returns None if year is higher thandatetime.MAXYEAR.
- bpo-26513: Fixes platform module detection of Windows Server
- bpo-23718: Fixed parsing time in week 0 before Jan 1. Original patch byTamás Bence Gedai.
- bpo-20589: Invoking Path.owner() and Path.group() on Windows now raiseNotImplementedError instead of ImportError.
- bpo-26177: Fixed the keys() method for Canvas and Scrollbar widgets.
- bpo-15068: Got rid of excessive buffering in the fileinput module. Thebufsize parameter is no longer used.
- bpo-2202: Fix UnboundLocalError inAbstractDigestAuthHandler.get_algorithm_impls. Initial patch by MathieuDupuy.
- bpo-25718: Fixed pickling and copying the accumulate() iterator with totalis None.
- bpo-26475: Fixed debugging output for regular expressions with the (?x)flag.
- bpo-26457: Fixed the subnets() methods in IP network classes for the casewhen resulting prefix length is equal to maximal prefix length. Based onpatch by Xiang Zhang.
- bpo-26385: Remove the file if the internal open() call inNamedTemporaryFile() fails. Patch by Silent Ghost.
- bpo-26402: Fix XML-RPC client to retry when the server shuts down apersistent connection. This was a regression related to the newhttp.client.RemoteDisconnected exception in 3.5.0a4.
- bpo-25913: Leading
<~is optional now in base64.a85decode() withadobe=True. Patch by Swati Jaiswal. - bpo-26186: Remove an invalid type check in importlib.util.LazyLoader.
- bpo-26367: importlib.__import__() raises SystemError likebuiltins.__import__() when
levelis specified but without anaccompanying package specified. - bpo-26309: In the “socketserver” module, shut down the request (closingthe connected socket) when verify_request() returns false. Patch by AvivPalivoda.
Library¶
- bpo-25995: os.walk() no longer uses FDs proportional to the tree depth.
- bpo-26117: The os.scandir() iterator now closes file descriptor not onlywhen the iteration is finished, but when it was failed with error.
- bpo-25911: Restored support of bytes paths in os.walk() on Windows.
- bpo-26045: Add UTF-8 suggestion to error message when posting anon-Latin-1 string with http.client.
- bpo-12923: Reset FancyURLopener’s redirect counter even if there is anexception. Based on patches by Brian Brazil and Daniel Rocco.
- bpo-25945: Fixed a crash when unpickle the functools.partial object withwrong state. Fixed a leak in failed functools.partial constructor. “args”and “keywords” attributes of functools.partial have now always types tupleand dict correspondingly.
- bpo-26202: copy.deepcopy() now correctly copies range() objects withnon-atomic attributes.
- bpo-23076: Path.glob() now raises a ValueError if it’s called with aninvalid pattern. Patch by Thomas Nyberg.
- bpo-19883: Fixed possible integer overflows in zipimport.
- bpo-26227: On Windows, getnameinfo(), gethostbyaddr() andgethostbyname_ex() functions of the socket module now decode the hostnamefrom the ANSI code page rather than UTF-8.
- bpo-26147: xmlrpc now works with strings not encodable with used non-UTF-8encoding.
- bpo-25935: Garbage collector now breaks reference loops with OrderedDict.
- bpo-16620: Fixed AttributeError in msilib.Directory.glob().
- bpo-26013: Added compatibility with broken protocol 2 pickles created inold Python 3 versions (3.4.3 and lower).
- bpo-25850: Use cross-compilation by default for 64-bit Windows.
- bpo-17633: Improve zipimport’s support for namespace packages.
- bpo-24705: Fix sysconfig._parse_makefile not expanding ${} vars appearingbefore $() vars.
- bpo-22138: Fix mock.patch behavior when patching descriptors. Restoreoriginal values after patching. Patch contributed by Sean McCully.
- bpo-25672: In the ssl module, enable the SSL_MODE_RELEASE_BUFFERS modeoption if it is safe to do so.
- bpo-26012: Don’t traverse into symlinks for
**pattern inpathlib.Path.[r]glob(). - bpo-24120: Ignore PermissionError when traversing a tree withpathlib.Path.[r]glob(). Patch by Ulrich Petri.
- bpo-25447: fileinput now uses sys.stdin as-is if it does not have a bufferattribute (restores backward compatibility).
- bpo-25447: Copying the lru_cache() wrapper object now always works,independedly from the type of the wrapped object (by returning theoriginal object unchanged).
- bpo-24103: Fixed possible use after free in ElementTree.XMLPullParser.
- bpo-25860: os.fwalk() no longer skips remaining directories when erroroccurs. Original patch by Samson Lee.
- bpo-25914: Fixed and simplified OrderedDict.__sizeof__.
- bpo-25902: Fixed various refcount issues in ElementTree iteration.
- bpo-25717: Restore the previous behaviour of tolerating most fstat()errors when opening files. This was a regression in 3.5a1, and stoppedanonymous temporary files from working in special cases.
- bpo-24903: Fix regression in number of arguments compileall accepts when‘-d’ is specified. The check on the number of arguments has been droppedcompletely as it never worked correctly anyway.
- bpo-25764: In the subprocess module, preserve any exception caused byfork() failure when preexec_fn is used.
- bpo-6478: _strptime’s regexp cache now is reset after changing timezonewith time.tzset().
- bpo-14285: When executing a package with the “python -m package” option,and package initialization fails, a proper traceback is now reported. The“runpy” module now lets exceptions from package initialization pass backto the caller, rather than raising ImportError.
- bpo-19771: Also in runpy and the “-m” option, omit the irrelevant message“… is a package and cannot be directly executed” if the package couldnot even be initialized (e.g. due to a bad
*.pycfile). - bpo-25177: Fixed problem with the mean of very small and very largenumbers. As a side effect, statistics.mean and statistics.variance shouldbe significantly faster.
- bpo-25718: Fixed copying object with state with boolean value is false.
- bpo-10131: Fixed deep copying of minidom documents. Based on patch byMarian Ganisin.
- bpo-25725: Fixed a reference leak in pickle.loads() when unpicklinginvalid data including tuple instructions.
- bpo-25663: In the Readline completer, avoid listing duplicate globalnames, and search the global namespace before searching builtins.
- bpo-25688: Fixed file leak in ElementTree.iterparse() raising an error.
- bpo-23914: Fixed SystemError raised by unpickler on broken pickle data.
- bpo-25691: Fixed crash on deleting ElementTree.Element attributes.
- bpo-25624: ZipFile now always writes a ZIP_STORED header for directoryentries. Patch by Dingyuan Wang.
- Skip getaddrinfo if host is already resolved. Patch by A. Jesse JiryuDavis.
- bpo-26050: Add asyncio.StreamReader.readuntil() method. Patch by МаркКоренберг.
- bpo-25924: Avoid unnecessary serialization of getaddrinfo(3) calls on OS Xversions 10.5 or higher. Original patch by A. Jesse Jiryu Davis.
- bpo-26406: Avoid unnecessary serialization of getaddrinfo(3) calls oncurrent versions of OpenBSD and NetBSD. Patch by A. Jesse Jiryu Davis.
- bpo-26848: Fix asyncio/subprocess.communicate() to handle empty input.Patch by Jack O’Connor.
- bpo-27040: Add loop.get_exception_handler method
- bpo-27041: asyncio: Add loop.create_future method
- bpo-27223: asyncio: Fix _read_ready and _write_ready to respect_conn_lost. Patch by Łukasz Langa.
- bpo-22970: asyncio: Fix inconsistency cancelling Condition.wait. Patch byDavid Coles.
IDLE¶
- bpo-5124: Paste with text selected now replaces the selection on X11. Thismatches how paste works on Windows, Mac, most modern Linux apps, and ttkwidgets. Original patch by Serhiy Storchaka.
- bpo-24759: Make clear in idlelib.idle_test.__init__ that the directory isa private implementation of test.test_idle and tool for maintainers.
- bpo-27196: Stop ‘ThemeChanged’ warnings when running IDLE tests. Thesepersisted after other warnings were suppressed in #20567. Apply SerhiyStorchaka’s update_idletasks solution to four test files. Record thisadditional advice in idle_test/README.txt
- bpo-20567: Revise idle_test/README.txt with advice about avoiding tkwarning messages from tests. Apply advice to several IDLE tests.
- bpo-27117: Make colorizer htest and turtledemo work with dark themes. Movecode for configuring text widget colors to a new function.
- bpo-26673: When tk reports font size as 0, change to size 10. Such fontson Linux prevented the configuration dialog from opening.
- bpo-21939: Add test for IDLE’s percolator. Original patch by SaimadhavHeblikar.
- bpo-21676: Add test for IDLE’s replace dialog. Original patch by SaimadhavHeblikar.
- bpo-18410: Add test for IDLE’s search dialog. Original patch by WestleyMartínez.
- bpo-21703: Add test for IDLE’s undo delegator. Original patch by SaimadhavHeblikar .
- bpo-27044: Add ConfigDialog.remove_var_callbacks to stop memory leaks.
- bpo-23977: Add more asserts to test_delegator.
- bpo-20640: Add tests for idlelib.configHelpSourceEdit. Patch by SaimadhavHeblikar.
- In the ‘IDLE-console differences’ section of the IDLE doc, clarify howrunning with IDLE affects sys.modules and the standard streams.
- bpo-25507: fix incorrect change in IOBinding that prevented printing.Augment IOBinding htest to include all major IOBinding functions.
- bpo-25905: Revert unwanted conversion of ‘ to ’ RIGHT SINGLE QUOTATIONMARK in README.txt and open this and NEWS.txt with ‘ascii’. Re-encodeCREDITS.txt to utf-8 and open it with ‘utf-8’.
Documentation¶
- bpo-19489: Moved the search box from the sidebar to the header and footerof each page. Patch by Ammar Askar.
- bpo-24136: Document the new PEP 448 unpacking syntax of 3.5.
- bpo-26736: Used HTTPS for external links in the documentation if possible.
- bpo-6953: Rework the Readline module documentation to group relatedfunctions together, and add more details such as what underlying Readlinefunctions and variables are accessed.
- bpo-23606: Adds note to ctypes documentation regarding cdll.msvcrt.
- bpo-25500: Fix documentation to not claim that __import__ is searched forin the global scope.
- bpo-26014: Update 3.x packaging documentation: * “See also” links to thenew docs are now provided in the legacy pages * links to setuptoolsdocumentation have been updated
Tests¶
- bpo-21916: Added tests for the turtle module. Patch by ingrid, GregoryLoyse and Jelle Zijlstra.
- bpo-26523: The multiprocessing thread pool (multiprocessing.dummy.Pool)was untested.
- bpo-26015: Added new tests for pickling iterators of mutable sequences.
- bpo-26325: Added test.support.check_no_resource_warning() to check that noResourceWarning is emitted.
- bpo-25940: Changed test_ssl to use self-signed.pythontest.net. Thisavoids relying on svn.python.org, which recently changed root certificate.
- bpo-25616: Tests for OrderedDict are extracted from test_collections intoseparate file test_ordered_dict.
- bpo-26583: Skip test_timestamp_overflow in test_import if bytecode filescannot be written.
Build¶
- bpo-26884: Fix linking extension modules for cross builds. Patch by Xavierde Gaye.
- bpo-22359: Disable the rules for running _freeze_importlib and pgen whencross- compiling. The output of these programs is normally saved with thesource code anyway, and is still regenerated when doing a native build.Patch by Xavier de Gaye.
- bpo-27229: Fix the cross-compiling pgen rule for in-tree builds. Patch byXavier de Gaye.
- bpo-21668: Link audioop, _datetime, _ctypes_test modules to libm, excepton Mac OS X. Patch written by Xavier de Gaye.
- bpo-25702: A –with-lto configure option has been added that will enablelink time optimizations at build time during a make profile-opt. Somecompilers and toolchains are known to not produce stable code when usingLTO, be sure to test things thoroughly before relying on it. It canprovide a few % speed up over profile-opt alone.
- bpo-26624: Adds validation of ucrtbase[d].dll version with warning for oldversions.
- bpo-17603: Avoid error about nonexistant fileblocks.o file by using alower-level check for st_blocks in struct stat.
- bpo-26079: Fixing the build output folder for tix-8.4.3.6. Patch by BjoernThiel.
- bpo-26465: Update Windows builds to use OpenSSL 1.0.2g.
- bpo-24421: Compile Modules/_math.c once, before building extensions.Previously it could fail to compile properly if the math and cmath buildswere concurrent.
- bpo-25348: Added
--pgoand--pgo-jobarguments toPCbuild\build.batfor building with Profile-Guided Optimization. TheoldPCbuild\build_pgo.batscript is now deprecated, and simply callsPCbuild\build.bat--pgo%*. - bpo-25827: Add support for building with ICC to
configure, including anew--with-iccflag. - bpo-25696: Fix installation of Python on UNIX with make -j9.
- bpo-26930: Update OS X 10.5+ 32-bit-only installer to build and link withOpenSSL 1.0.2h.
- bpo-26268: Update Windows builds to use OpenSSL 1.0.2f.
- bpo-25136: Support Apple Xcode 7’s new textual SDK stub libraries.
- bpo-24324: Do not enable unreachable code warnings when using gcc as theoption does not work correctly in older versions of gcc and has beensilently removed as of gcc-4.5.
Windows¶
- bpo-27053: Updates make_zip.py to correctly generate library ZIP file.
- bpo-26268: Update the prepare_ssl.py script to handle OpenSSL releasesthat don’t include the contents of the include directory (that is, 1.0.2eand later).
- bpo-26071: bdist_wininst created binaries fail to start and find 32bitPython
- bpo-26073: Update the list of magic numbers in launcher
- bpo-26065: Excludes venv from library when generating embeddable distro.
Tools/Demos¶
- bpo-26799: Fix python-gdb.py: don’t get C types once when the Python codeis loaded, but get C types on demand. The C types can change ifpython-gdb.py is loaded before the Python executable. Patch written byThomas Ilsche.
- bpo-26271: Fix the Freeze tool to properly use flags passed throughconfigure. Patch by Daniel Shaulov.
- bpo-26489: Add dictionary unpacking support to Tools/parser/unparse.py.Patch by Guo Ci Teo.
- bpo-26316: Fix variable name typo in Argument Clinic.
Windows¶
- bpo-17500: Remove unused and outdated icons. (See also:https://github.com/python/pythondotorg/issues/945)
Python 3.5.1 final¶
Release date: 2015-12-06
Python 3.5.1 release candidate 1¶
Release date: 2015-11-22
Core and Builtins¶
- bpo-25630: Fix a possible segfault during argument parsing in functionsthat accept filesystem paths.
- bpo-23564: Fixed a partially broken sanity check in the _posixsubprocessinternals regarding how fds_to_pass were passed to the child. The bug hadno actual impact as subprocess.py already avoided it.
- bpo-25388: Fixed tokenizer crash when processing undecodable source codewith a null byte.
- bpo-25462: The hash of the key now is calculated only once in mostoperations in C implementation of OrderedDict.
- bpo-22995: Default implementation of __reduce__ and __reduce_ex__ nowrejects builtin types with not defined __new__.
- bpo-25555: Fix parser and AST: fill lineno and col_offset of “arg” nodewhen compiling AST from Python objects.
- bpo-24802: Avoid buffer overreads when int(), float(), compile(), exec()and eval() are passed bytes-like objects. These objects are notnecessarily terminated by a null byte, but the functions assumed theywere.
- bpo-24726: Fixed a crash and leaking NULL in repr() of OrderedDict thatwas mutated by direct calls of dict methods.
- bpo-25449: Iterating OrderedDict with keys with unstable hash now raisesKeyError in C implementations as well as in Python implementation.
- bpo-25395: Fixed crash when highly nested OrderedDict structures weregarbage collected.
- bpo-25274: sys.setrecursionlimit() now raises a RecursionError if the newrecursion limit is too low depending at the current recursion depth.Modify also the “lower-water mark” formula to make it monotonic. This markis used to decide when the overflowed flag of the thread state is reset.
- bpo-24402: Fix input() to prompt to the redirected stdout whensys.stdout.fileno() fails.
- bpo-24806: Prevent builtin types that are not allowed to be subclassedfrom being subclassed through multiple inheritance.
- bpo-24848: Fixed a number of bugs in UTF-7 decoding of misformed data.
- bpo-25280: Import trace messages emitted in verbose (-v) mode are nolonger formatted twice.
- bpo-25003: On Solaris 11.3 or newer, os.urandom() now uses the getrandom()function instead of the getentropy() function. The getentropy() functionis blocking to generate very good quality entropy, os.urandom() doesn’tneed such high- quality entropy.
- bpo-25182: The stdprinter (used as sys.stderr before the io module isimported at startup) now uses the backslashreplace error handler.
- bpo-25131: Make the line number and column offset of set/dict literals andcomprehensions correspond to the opening brace.
- bpo-25150: Hide the private _Py_atomic_xxx symbols from the publicPython.h header to fix a compilation error with OpenMP.PyThreadState_GET() becomes an alias to PyThreadState_Get() to avoid ABIincompatibilies.
Library¶
- bpo-25626: Change three zlib functions to accept sizes that fit inPy_ssize_t, but internally cap those sizes to UINT_MAX. This resolves aregression in 3.5 where GzipFile.read() failed to read chunks larger than2 or 4 GiB. The change affects the zlib.Decompress.decompress()max_length parameter, the zlib.decompress() bufsize parameter, and thezlib.Decompress.flush() length parameter.
- bpo-25583: Avoid incorrect errors raised by os.makedirs(exist_ok=True)when the OS gives priority to errors such as EACCES over EEXIST.
- bpo-25593: Change semantics of EventLoop.stop() in asyncio.
- bpo-6973: When we know a subprocess.Popen process has died, do not allowthe send_signal(), terminate(), or kill() methods to do anything as theycould potentially signal a different process.
- bpo-25590: In the Readline completer, only call getattr() once perattribute.
- bpo-25498: Fix a crash when garbage-collecting ctypes objects created bywrapping a memoryview. This was a regression made in 3.5a1. Based onpatch by Eryksun.
- bpo-25584: Added “escape” to the __all__ list in the glob module.
- bpo-25584: Fixed recursive glob() with patterns starting with
**. - bpo-25446: Fix regression in smtplib’s AUTH LOGIN support.
- bpo-18010: Fix the pydoc web server’s module search function to handleexceptions from importing packages.
- bpo-25554: Got rid of circular references in regular expression parsing.
- bpo-25510: fileinput.FileInput.readline() now returns b’’ instead of ‘’ atthe end if the FileInput was opened with binary mode. Patch by RyosukeIto.
- bpo-25503: Fixed inspect.getdoc() for inherited docstrings of properties.Original patch by John Mark Vandenberg.
- bpo-25515: Always use os.urandom as a source of randomness in uuid.uuid4.
- bpo-21827: Fixed textwrap.dedent() for the case when largest commonwhitespace is a substring of smallest leading whitespace. Based on patchby Robert Li.
- bpo-25447: The lru_cache() wrapper objects now can be copied and pickled(by returning the original object unchanged).
- bpo-25390: typing: Don’t crash on Union[str, Pattern].
- bpo-25441: asyncio: Raise error from drain() when socket is closed.
- bpo-25410: Cleaned up and fixed minor bugs in C implementation ofOrderedDict.
- bpo-25411: Improved Unicode support in SMTPHandler through better use ofthe email package. Thanks to user simon04 for the patch.
- bpo-25407: Remove mentions of the formatter module being removed in Python3.6.
- bpo-25406: Fixed a bug in C implementation of OrderedDict.move_to_end()that caused segmentation fault or hang in iterating after moving severalitems to the start of ordered dict.
- bpo-25364: zipfile now works in threads disabled builds.
- bpo-25328: smtpd’s SMTPChannel now correctly raises a ValueError if bothdecode_data and enable_SMTPUTF8 are set to true.
- bpo-25316: distutils raises OSError instead of DistutilsPlatformError whenMSVC is not installed.
- bpo-25380: Fixed protocol for the STACK_GLOBAL opcode inpickletools.opcodes.
- bpo-23972: Updates asyncio datagram create method allowing reuseport andreuseaddr socket options to be set prior to binding the socket. Mirroringthe existing asyncio create_server method the reuseaddr option fordatagram sockets defaults to True if the O/S is ‘posix’ (except if theplatform is Cygwin). Patch by Chris Laws.
- bpo-25304: Add asyncio.run_coroutine_threadsafe(). This lets you submit acoroutine to a loop from another thread, returning aconcurrent.futures.Future. By Vincent Michel.
- bpo-25232: Fix CGIRequestHandler to split the query from the URL at thefirst question mark (?) rather than the last. Patch from Xiang Zhang.
- bpo-24657: Prevent CGIRequestHandler from collapsing slashes in the querypart of the URL as if it were a path. Patch from Xiang Zhang.
- bpo-24483: C implementation of functools.lru_cache() now calculates key’shash only once.
- bpo-22958: Constructor and update method of weakref.WeakValueDictionarynow accept the self and the dict keyword arguments.
- bpo-22609: Constructor of collections.UserDict now accepts the selfkeyword argument.
- bpo-25111: Fixed comparison of traceback.FrameSummary.
- bpo-25262: Added support for BINBYTES8 opcode in Python implementation ofunpickler. Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8opcodes no longer silently ignored on 32-bit platforms in Cimplementation.
- bpo-25034: Fix string.Formatter problem with auto-numbering and nestedformat_specs. Patch by Anthon van der Neut.
- bpo-25233: Rewrite the guts of asyncio.Queue and asyncio.Semaphore to bemore understandable and correct.
- bpo-25203: Failed readline.set_completer_delims() no longer left themodule in inconsistent state.
- bpo-23600: Default implementation of tzinfo.fromutc() was returning wrongresults in some cases.
- bpo-23329: Allow the ssl module to be built with older versions ofLibreSSL.
- Prevent overflow in _Unpickler_Read.
- bpo-25047: The XML encoding declaration written by Element Tree nowrespects the letter case given by the user. This restores the ability towrite encoding names in uppercase like “UTF-8”, which worked in Python 2.
- bpo-25135: Make deque_clear() safer by emptying the deque before clearing.This helps avoid possible reentrancy issues.
- bpo-19143: platform module now reads Windows version from kernel32.dll toavoid compatibility shims.
- bpo-25092: Fix datetime.strftime() failure when errno was already set toEINVAL.
- bpo-23517: Fix rounding in fromtimestamp() and utcfromtimestamp() methodsof datetime.datetime: microseconds are now rounded to nearest with tiesgoing to nearest even integer (ROUND_HALF_EVEN), instead of being roundingtowards minus infinity (ROUND_FLOOR). It’s important that these methodsuse the same rounding mode than datetime.timedelta to keep the property:(datetime(1970,1,1) + timedelta(seconds=t)) ==datetime.utcfromtimestamp(t). It also the rounding mode used byround(float) for example.
- bpo-25155: Fix datetime.datetime.now() and datetime.datetime.utcnow() onWindows to support date after year 2038. It was a regression introduced inPython 3.5.0.
- bpo-25108: Omitted internal frames in traceback functions print_stack(),format_stack(), and extract_stack() called without arguments.
- bpo-25118: Fix a regression of Python 3.5.0 in os.waitpid() on Windows.
- bpo-24684: socket.socket.getaddrinfo() now callsPyUnicode_AsEncodedString() instead of calling the encode() method of thehost, to handle correctly custom string with an encode() method whichdoesn’t return a byte string. The encoder of the IDNA codec is now calleddirectly instead of calling the encode() method of the string.
- bpo-25060: Correctly compute stack usage of the BUILD_MAP opcode.
- bpo-24857: Comparing call_args to a long sequence now correctly returns aboolean result instead of raising an exception. Patch by A Kaptur.
- bpo-23144: Make sure that HTMLParser.feed() returns all the data, evenwhen convert_charrefs is True.
- bpo-24982: shutil.make_archive() with the “zip” format now adds entriesfor directories (including empty directories) in ZIP file.
- bpo-25019: Fixed a crash caused by setting non-string key of expat parser.Based on patch by John Leitch.
- bpo-16180: Exit pdb if file has syntax error, instead of trapping user inan infinite loop. Patch by Xavier de Gaye.
- bpo-24891: Fix a race condition at Python startup if the file descriptorof stdin (0), stdout (1) or stderr (2) is closed while Python is creatingsys.stdin, sys.stdout and sys.stderr objects. These attributes are now setto None if the creation of the object failed, instead of raising anOSError exception. Initial patch written by Marco Paolini.
- bpo-24992: Fix error handling and a race condition (related to garbagecollection) in collections.OrderedDict constructor.
- bpo-24881: Fixed setting binary mode in Python implementation of FileIO onWindows and Cygwin. Patch from Akira Li.
- bpo-25578: Fix (another) memory leak in SSLSocket.getpeercer().
- bpo-25530: Disable the vulnerable SSLv3 protocol by default when creatingssl.SSLContext.
- bpo-25569: Fix memory leak in SSLSocket.getpeercert().
- bpo-25471: Sockets returned from accept() shouldn’t appear to benonblocking.
- bpo-25319: When threading.Event is reinitialized, the underlying conditionshould use a regular lock rather than a recursive lock.
- bpo-21112: Fix regression in unittest.expectedFailure on subclasses. Patchfrom Berker Peksag.
- bpo-24764: cgi.FieldStorage.read_multi() now ignores the Content-Lengthheader in part headers. Patch written by Peter Landry and reviewed byPierre Quentel.
- bpo-24913: Fix overrun error in deque.index(). Found by John Leitch andBryce Darling.
- bpo-24774: Fix docstring in http.server.test. Patch from Chiu-Hsiang Hsu.
- bpo-21159: Improve message inconfigparser.InterpolationMissingOptionError. Patch from Łukasz Langa.
- bpo-20362: Honour TestCase.longMessage correctly in assertRegex. Patchfrom Ilia Kurenkov.
- bpo-23572: Fixed functools.singledispatch on classes with falsymetaclasses. Patch by Ethan Furman.
- asyncio: ensure_future() now accepts awaitable objects.
IDLE¶
- bpo-15348: Stop the debugger engine (normally in a user process) beforeclosing the debugger window (running in the IDLE process). This preventsthe RuntimeErrors that were being caught and ignored.
- bpo-24455: Prevent IDLE from hanging when a) closing the shell while thedebugger is active (15347); b) closing the debugger with the [X] button(15348); and c) activating the debugger when already active (24455). Thepatch by Mark Roseman does this by making two changes. 1. Suspend andresume the gui.interaction method with the tcl vwait mechanism intendedfor this purpose (instead of root.mainloop & .quit). 2. In gui.run, allowany existing interaction to terminate first.
- Change ‘The program’ to ‘Your program’ in an IDLE ‘kill program?’ messageto make it clearer that the program referred to is the currently runninguser program, not IDLE itself.
- bpo-24750: Improve the appearance of the IDLE editor window status bar.Patch by Mark Roseman.
- bpo-25313: Change the handling of new built-in text color themes to betteraddress the compatibility problem introduced by the addition of IDLE Dark.Consistently use the revised idleConf.CurrentTheme everywhere in idlelib.
- bpo-24782: Extension configuration is now a tab in the IDLE Preferencesdialog rather than a separate dialog. The former tabs are now a sortedlist. Patch by Mark Roseman.
- bpo-22726: Re-activate the config dialog help button with some contentabout the other buttons and the new IDLE Dark theme.
- bpo-24820: IDLE now has an ‘IDLE Dark’ built-in text color theme. It ismore or less IDLE Classic inverted, with a cobalt blue background.Strings, comments, keywords, … are still green, red, orange, … . Touse it with IDLEs released before November 2015, hit the ‘Save as NewCustom Theme’ button and enter a new name, such as ‘Custom Dark’. Thecustom theme will work with any IDLE release, and can be modified.
- bpo-25224: README.txt is now an idlelib index for IDLE developers andcurious users. The previous user content is now in the IDLE doc chapter.‘IDLE’ now means ‘Integrated Development and Learning Environment’.
- bpo-24820: Users can now set breakpoint colors in Settings -> CustomHighlighting. Original patch by Mark Roseman.
- bpo-24972: Inactive selection background now matches active selectionbackground, as configured by users, on all systems. Found items are nowalways highlighted on Windows. Initial patch by Mark Roseman.
- bpo-24570: Idle: make calltip and completion boxes appear on Macs affectedby a tk regression. Initial patch by Mark Roseman.
- bpo-24988: Idle ScrolledList context menus (used in debugger) now work onMac Aqua. Patch by Mark Roseman.
- bpo-24801: Make right-click for context menu work on Mac Aqua. Patch byMark Roseman.
- bpo-25173: Associate tkinter messageboxes with a specific widget. For MacOSX, make them a ‘sheet’. Patch by Mark Roseman.
- bpo-25198: Enhance the initial html viewer now used for Idle Help. *Properly indent fixed-pitch text (patch by Mark Roseman). * Give codesnippet a very Sphinx- like light blueish-gray background. * Re-useinitial width and height set by users for shell and editor. * When theTable of Contents (TOC) menu is used, put the section header at the top ofthe screen.
- bpo-25225: Condense and rewrite Idle doc section on text colors.
- bpo-21995: Explain some differences between IDLE and console Python.
- bpo-22820: Explain need forprint when running file from Idle editor.
- bpo-25224: Doc: augment Idle feature list and no-subprocess section.
- bpo-25219: Update doc for Idle command line options. Some were missing andnotes were not correct.
- bpo-24861: Most of idlelib is private and subject to change. Useidleib.idle.* to start Idle. See idlelib.__init__.__doc__.
- bpo-25199: Idle: add synchronization comments for future maintainers.
- bpo-16893: Replace help.txt with help.html for Idle doc display. The newidlelib/help.html is rstripped Doc/build/html/library/idle.html. It looksbetter than help.txt and will better document Idle as released. Thetkinter html viewer that works for this file was written by Mark Roseman.The now unused EditorWindow.HelpDialog class and helt.txt file aredeprecated.
- bpo-24199: Deprecate unused idlelib.idlever with possible removal in 3.6.
- bpo-24790: Remove extraneous code (which also create 2 & 3 conflicts).
Documentation¶
- bpo-22558: Add remaining doc links to source code for Python-codedmodules. Patch by Yoni Lavi.
- bpo-12067: Rewrite Comparisons section in the Expressions chapter of thelanguage reference. Some of the details of comparing mixed types wereincorrect or ambiguous. NotImplemented is only relevant at a lower levelthan the Expressions chapter. Added details of comparing range() objects,and default behaviour and consistency suggestions for user-definedclasses. Patch from Andy Maier.
- bpo-24952: Clarify the default size argument of stack_size() in the“threading” and “_thread” modules. Patch from Mattip.
- bpo-23725: Overhaul tempfile docs. Note deprecated status of mktemp. Patchfrom Zbigniew Jędrzejewski-Szmek.
- bpo-24808: Update the types of some PyTypeObject fields. Patch by JosephWeston.
- bpo-22812: Fix unittest discovery examples. Patch from Pam McA’Nulty.
Tests¶
- bpo-25449: Added tests for OrderedDict subclasses.
- bpo-25099: Make test_compileall not fail when an entry on sys.path cannotbe written to (commonly seen in administrative installs on Windows).
- bpo-23919: Prevents assert dialogs appearing in the test suite.
PCbuild\rt.batnow accepts an unlimited number of arguments to passalong to regrtest.py. Previously there was a limit of 9.
Build¶
- bpo-24915: Add LLVM support for PGO builds and use the test suite togenerate the profile data. Initial patch by Alecsandru Patrascu of Intel.
- bpo-24910: Windows MSIs now have unique display names.
- bpo-24986: It is now possible to build Python on Windows without errorswhen external libraries are not available.
Windows¶
- bpo-25450: Updates shortcuts to start Python in installation directory.
- bpo-25164: Changes default all-users install directory to match per-userdirectory.
- bpo-25143: Improves installer error messages for unsupported platforms.
- bpo-25163: Display correct directory in installer when using non-defaultsettings.
- bpo-25361: Disables use of SSE2 instructions in Windows 32-bit build
- bpo-25089: Adds logging to installer for case where launcher is notselected on upgrade.
- bpo-25165: Windows uninstallation should not remove launcher if otherversions remain
- bpo-25112: py.exe launcher is missing icons
- bpo-25102: Windows installer does not precompile for -O or -OO.
- bpo-25081: Makes Back button in installer go back to upgrade page whenupgrading.
- bpo-25091: Increases font size of the installer.
- bpo-25126: Clarifies that the non-web installer will download somecomponents.
- bpo-25213: Restores requestedExecutionLevel to manifest to disable UACvirtualization.
- bpo-25022: Removed very outdated PC/example_nt/ directory.
Python 3.5.0 final¶
Release date: 2015-09-13
Python 3.5.0 release candidate 4¶
Release date: 2015-09-09
Python 3.5.0 release candidate 3¶
Release date: 2015-09-07
Core and Builtins¶
Library¶
- bpo-24917: time_strftime() buffer over-read.
- bpo-24748: To resolve a compatibility problem found with py2exe andpywin32, imp.load_dynamic() once again ignores previously loaded modulesto support Python modules replacing themselves with extension modules.Patch by Petr Viktorin.
- bpo-24635: Fixed a bug in typing.py where isinstance([], typing.Iterable)would return True once, then False on subsequent calls.
- bpo-24989: Fixed buffer overread in BytesIO.readline() if a position isset beyond size. Based on patch by John Leitch.
- bpo-24913: Fix overrun error in deque.index(). Found by John Leitch andBryce Darling.
Python 3.5.0 release candidate 2¶
Release date: 2015-08-25
Core and Builtins¶
- bpo-24769: Interpreter now starts properly when dynamic loading isdisabled. Patch by Petr Viktorin.
- bpo-21167: NAN operations are now handled correctly when python iscompiled with ICC even if -fp-model strict is not specified.
- bpo-24492: A “package” lacking a __name__ attribute when trying to performa
from..import...statement will trigger an ImportError instead ofan AttributeError.
Python 3.5.0 release candidate 1¶
Release date: 2015-08-09
Library¶
- bpo-24824: Signatures of codecs.encode() and codecs.decode() now arecompatible with pydoc.
- bpo-24634: Importing uuid should not try to load libc on Windows
- bpo-24798: _msvccompiler.py doesn’t properly support manifests
- bpo-4395: Better testing and documentation of binary operators. Patch byMartin Panter.
- bpo-23973: Update typing.py from GitHub repo.
- bpo-23004: mock_open() now reads binary data correctly when the type ofread_data is bytes. Initial patch by Aaron Hill.
- bpo-23888: Handle fractional time in cookie expiry. Patch by ssh.
- bpo-23652: Make it possible to compile the select module against the libcheaders from the Linux Standard Base, which do not include some EPOLLmacros. Patch by Matt Frank.
- bpo-22932: Fix timezones in email.utils.formatdate. Patch from DmitryShachnev.
- bpo-23779: imaplib raises TypeError if authenticator tries to abort. Patchfrom Craig Holmquist.
- bpo-23319: Fix ctypes.BigEndianStructure, swap correctly bytes. Patchwritten by Matthieu Gautier.
- bpo-23254: Document how to close the TCPServer listening socket. Patchfrom Martin Panter.
- bpo-19450: Update Windows and OS X installer builds to use SQLite 3.8.11.
- bpo-17527: Add PATCH to wsgiref.validator. Patch from Luca Sbardella.
- bpo-24791: Fix grammar regression for call syntax: ‘g(*a or b)’.
IDLE¶
- bpo-23672: Allow Idle to edit and run files with astral chars in name.Patch by Mohd Sanad Zaki Rizvi.
- bpo-24745: Idle editor default font. Switch from Courier toplatform-sensitive TkFixedFont. This should not affect current customizedfont selections. If there is a problem, edit$HOME/.idlerc/config-main.cfg and remove ‘fontxxx’ entries from [EditorWindow]. Patch by Mark Roseman.
- bpo-21192: Idle editor. When a file is run, put its name in the restartbar. Do not print false prompts. Original patch by Adnan Umer.
- bpo-13884: Idle menus. Remove tearoff lines. Patch by Roger Serwy.
Documentation¶
- bpo-24129: Clarify the reference documentation for name resolution. Thisincludes removing the assumption that readers will be familiar with thename resolution scheme Python used prior to the introduction of lexicalscoping for function namespaces. Patch by Ivan Levkivskyi.
- bpo-20769: Improve reload() docs. Patch by Dorian Pula.
- bpo-23589: Remove duplicate sentence from the FAQ. Patch by Yongzhi Pan.
- bpo-24729: Correct IO tutorial to match implementation regarding encodingparameter to open function.
Python 3.5.0 beta 4¶
Release date: 2015-07-26
Core and Builtins¶
- bpo-23573: Restored optimization of bytes.rfind() and bytearray.rfind()for single-byte argument on Linux.
- bpo-24569: Make PEP 448 dictionary evaluation more consistent.
- bpo-24583: Fix crash when set is mutated while being updated.
- bpo-24407: Fix crash when dict is mutated while being updated.
- bpo-24619: New approach for tokenizing async/await. As a consequence, itis now possible to have one-line ‘async def foo(): await ..’ functions.
- bpo-24687: Plug refleak on SyntaxError in function parameters annotations.
- bpo-15944: memoryview: Allow arbitrary formats when casting to bytes.Patch by Martin Panter.
Library¶
- bpo-23441: rcompleter now prints a tab character instead of displayingpossible completions for an empty word. Initial patch by Martin Sekera.
- bpo-24683: Fixed crashes in _json functions called with arguments ofinappropriate type.
- bpo-21697: shutil.copytree() now correctly handles symbolic links thatpoint to directories. Patch by Eduardo Seabra and Thomas Kluyver.
- bpo-14373: Fixed segmentation fault when gc.collect() is called duringconstructing lru_cache (C implementation).
- bpo-24695: Fix a regression in traceback.print_exception(). Ifexc_traceback is None we shouldn’t print a traceback header like describedin the documentation.
- bpo-24620: Random.setstate() now validates the value of state lastelement.
- bpo-22485: Fixed an issue that caused
inspect.getsourceto returnincorrect results on nested functions. - bpo-22153: Improve unittest docs. Patch from Martin Panter and evilzero.
- bpo-24580: Symbolic group references to open group in re patterns now areexplicitly forbidden as well as numeric group references.
- bpo-24206: Fixed __eq__ and __ne__ methods of inspect classes.
- bpo-24631: Fixed regression in the timeit module with multiline setup.
- bpo-18622: unittest.mock.mock_open().reset_mock would recurse infinitely.Patch from Nicola Palumbo and Laurent De Buyst.
- bpo-23661: unittest.mock side_effects can now be exceptions again. Thiswas a regression vs Python 3.4. Patch from Ignacio Rossi
- bpo-24608: chunk.Chunk.read() now always returns bytes, not str.
- bpo-18684: Fixed reading out of the buffer in the re module.
- bpo-24259: tarfile now raises a ReadError if an archive is truncatedinside a data segment.
- bpo-15014: SMTP.auth() and SMTP.login() now support RFC 4954’s optionalinitial- response argument to the SMTP AUTH command.
- bpo-24669: Fix inspect.getsource() for ‘async def’ functions. Patch by KaiGroner.
- bpo-24688: ast.get_docstring() for ‘async def’ functions.
Python 3.5.0 beta 3¶
Release date: 2015-07-05
Core and Builtins¶
- bpo-24467: Fixed possible buffer over-read in bytearray. The bytearrayobject now always allocates place for trailing null byte and it’s buffernow is always null-terminated.
- Upgrade to Unicode 8.0.0.
- bpo-24345: Add Py_tp_finalize slot for the stable ABI.
- bpo-24400: Introduce a distinct type for PEP 492 coroutines; addtypes.CoroutineType, inspect.getcoroutinestate,inspect.getcoroutinelocals; coroutines no longer use CO_GENERATOR flag;sys.set_coroutine_wrapper works only for ‘async def’ coroutines;inspect.iscoroutine no longer uses collections.abc.Coroutine, it’sintended to test for pure ‘async def’ coroutines only; add new opcode:GET_YIELD_FROM_ITER; fix generators wrapper used in types.coroutine to beinstance of collections.abc.Generator; collections.abc.Awaitable andcollections.abc.Coroutine can no longer be used to detect generator-basedcoroutines–use inspect.isawaitable instead.
- bpo-24450: Add gi_yieldfrom to generators and cr_await to coroutines.Contributed by Benno Leslie and Yury Selivanov.
- bpo-19235: Add new RecursionError exception. Patch by Georg Brandl.
Library¶
- bpo-21750: mock_open.read_data can now be read from each instance, as itcould in Python 3.3.
- bpo-24552: Fix use after free in an error case of the _pickle module.
- bpo-24514: tarfile now tolerates number fields consisting of onlywhitespace.
- bpo-19176: Fixed doctype() related bugs in C implementation ofElementTree. A deprecation warning no longer issued by XMLParser subclasswith default doctype() method. Direct call of doctype() now issues awarning. Parser’s doctype() now is not called if target’s doctype() iscalled. Based on patch by Martin Panter.
- bpo-20387: Restore semantic round-trip correctness in tokenize/untokenizefor tab- indented blocks.
- bpo-24456: Fixed possible buffer over-read in adpcm2lin() and lin2adpcm()functions of the audioop module.
- bpo-24336: The contextmanager decorator now works with functions withkeyword arguments called “func” and “self”. Patch by Martin Panter.
- bpo-24522: Fix possible integer overflow in json accelerator module.
- bpo-24489: ensure a previously set C errno doesn’t disturb cmath.polar().
- bpo-24408: Fixed AttributeError in measure() and metrics() methods oftkinter.Font.
- bpo-14373: C implementation of functools.lru_cache() now can be used withmethods.
- bpo-24347: Set KeyError if PyDict_GetItemWithError returns NULL.
- bpo-24348: Drop superfluous incref/decref.
- bpo-24359: Check for changed OrderedDict size during iteration.
- bpo-24368: Support keyword arguments in OrderedDict methods.
- bpo-24362: Simplify the C OrderedDict fast nodes resize logic.
- bpo-24377: Fix a ref leak in OrderedDict.__repr__.
- bpo-24369: Defend against key-changes during iteration.
Tests¶
Documentation¶
Python 3.5.0 beta 2¶
Release date: 2015-05-31
Core and Builtins¶
- bpo-24284: The startswith and endswith methods of the str class no longerreturn True when finding the empty string and the indexes are completelyout of range.
- bpo-24115: Update uses of PyObject_IsTrue(), PyObject_Not(),PyObject_IsInstance(), PyObject_RichCompareBool() and _PyDict_Contains()to check for and handle errors correctly.
- bpo-24328: Fix importing one character extension modules.
- bpo-11205: In dictionary displays, evaluate the key before the value.
- bpo-24285: Fixed regression that prevented importing extension modulesfrom inside packages. Patch by Petr Viktorin.
Library¶
- bpo-23247: Fix a crash in the StreamWriter.reset() of CJK codecs.
- bpo-24270: Add math.isclose() and cmath.isclose() functions as per PEP485. Contributed by Chris Barker and Tal Einat.
- bpo-5633: Fixed timeit when the statement is a string and the setup isnot.
- bpo-24326: Fixed audioop.ratecv() with non-default weightB argument.Original patch by David Moore.
- bpo-16991: Add a C implementation of OrderedDict.
- bpo-23934: Fix inspect.signature to fail correctly for builtin typeslacking signature information. Initial patch by James Powell.
Python 3.5.0 beta 1¶
Release date: 2015-05-24
Core and Builtins¶
- bpo-24276: Fixed optimization of property descriptor getter.
- bpo-24268: PEP 489: Multi-phase extension module initialization. Patch byPetr Viktorin.
- bpo-23955: Add pyvenv.cfg option to suppress registry/environment lookupfor generating sys.path on Windows.
- bpo-24257: Fixed system error in the comparison of fakedtypes.SimpleNamespace.
- bpo-22939: Fixed integer overflow in iterator object. Patch by ClementRouault.
- bpo-23985: Fix a possible buffer overrun when deleting a slice from thefront of a bytearray and then appending some other bytes data.
- bpo-24102: Fixed exception type checking in standard error handlers.
- bpo-15027: The UTF-32 encoder is now 3x to 7x faster.
- bpo-23290: Optimize set_merge() for cases where the target is empty.(Contributed by Serhiy Storchaka.)
- bpo-2292: PEP 448: Additional Unpacking Generalizations.
- bpo-24096: Make warnings.warn_explicit more robust against mutation of thewarnings.filters list.
- bpo-23996: Avoid a crash when a delegated generator raises an unnormalizedStopIteration exception. Patch by Stefan Behnel.
- bpo-23910: Optimize property() getter calls. Patch by Joe Jevnik.
- bpo-23911: Move path-based importlib bootstrap code to a separate frozenmodule.
- bpo-24192: Fix namespace package imports.
- bpo-24022: Fix tokenizer crash when processing undecodable source code.
- bpo-9951: Added a hex() method to bytes, bytearray, and memoryview.
- bpo-22906: PEP 479: Change StopIteration handling inside generators.
- bpo-24017: PEP 492: Coroutines with async and await syntax.
Library¶
- bpo-14373: Added C implementation of functools.lru_cache(). Based onpatches by Matt Joiner and Alexey Kachayev.
- bpo-24230: The tempfile module now accepts bytes for prefix, suffix anddir parameters and returns bytes in such situations (matching the osmodule APIs).
- bpo-22189: collections.UserString now supports __getnewargs__(),__rmod__(), casefold(), format_map(), isprintable(), and maketrans().Patch by Joe Jevnik.
- bpo-24244: Prevents termination when an invalid format string isencountered on Windows in strftime.
- bpo-23973: PEP 484: Add the typing module.
- bpo-23086: The collections.abc.Sequence() abstract base class addedstart andstop parameters to the index() mixin. Patch by DevinJeanpierre.
- bpo-20035: Replaced the
tkinter._fixmodule used for setting up theTcl/Tk environment on Windows with a private function in the_tkintermodule that makes no permanent changes to the environment. - bpo-24257: Fixed segmentation fault in sqlite3.Row constructor with fakedcursor type.
- bpo-15836: assertRaises(), assertRaisesRegex(), assertWarns() andassertWarnsRegex() assertments now check the type of the first argument toprevent possible user error. Based on patch by Daniel Wagner-Hall.
- bpo-9858: Add missing method stubs to _io.RawIOBase. Patch by LauraRupprecht.
- bpo-22955: attrgetter, itemgetter and methodcaller objects in the operatormodule now support pickling. Added readable and evaluable repr for theseobjects. Based on patch by Josh Rosenberg.
- bpo-22107: tempfile.gettempdir() and tempfile.mkdtemp() now try again whena directory with the chosen name already exists on Windows as well as onUnix. tempfile.mkstemp() now fails early if parent directory is not valid(not exists or is a file) on Windows.
- bpo-23780: Improved error message in os.path.join() with single argument.
- bpo-6598: Increased time precision and random number range inemail.utils.make_msgid() to strengthen the uniqueness of the message ID.
- bpo-24091: Fixed various crashes in corner cases in C implementation ofElementTree.
- bpo-21931: msilib.FCICreate() now raises TypeError in the case of a badargument instead of a ValueError with a bogus FCI error number. Patch byJeffrey Armstrong.
- bpo-13866:quote_via argument added to urllib.parse.urlencode.
- bpo-20098: New mangle_from policy option for email, default True forcompat32, but False for all other policies.
- bpo-24211: The email library now supports RFC 6532: it can generateheaders using utf-8 instead of encoded words.
- bpo-16314: Added support for the LZMA compression in distutils.
- bpo-21804: poplib now supports RFC 6856 (UTF8).
- bpo-18682: Optimized pprint functions for builtin scalar types.
- bpo-22027: smtplib now supports RFC 6531 (SMTPUTF8).
- bpo-23488: Random generator objects now consume 2x less memory on 64-bit.
- bpo-1322: platform.dist() and platform.linux_distribution() functions arenow deprecated. Initial patch by Vajrasky Kok.
- bpo-22486: Added the math.gcd() function. The fractions.gcd() functionnow is deprecated. Based on patch by Mark Dickinson.
- bpo-24064: Property() docstrings are now writeable. (Patch by BerkerPeksag.)
- bpo-22681: Added support for the koi8_t encoding.
- bpo-22682: Added support for the kz1048 encoding.
- bpo-23796: peek and read1 methods of BufferedReader now raise ValueErrorif they called on a closed object. Patch by John Hergenroeder.
- bpo-21795: smtpd now supports the 8BITMIME extension whenever the newdecode_data constructor argument is set to False.
- bpo-24155: optimize heapq.heapify() for better cache performance whenheapifying large lists.
- bpo-21800: imaplib now supports RFC 5161 (enable), RFC 6855(utf8/internationalized email) and automatically encodes non-ASCIIusernames and passwords to UTF8.
- bpo-20274: When calling a _sqlite.Connection, it now complains if passedany keyword arguments. Previously it silently ignored them.
- bpo-20274: Remove ignored and erroneous “kwargs” parameters from threeMETH_VARARGS methods on _sqlite.Connection.
- bpo-24134: assertRaises(), assertRaisesRegex(), assertWarns() andassertWarnsRegex() checks now emits a deprecation warning when callable isNone or keyword arguments except msg is passed in the context managermode.
- bpo-24018: Add a collections.abc.Generator abstract base class.Contributed by Stefan Behnel.
- bpo-23880: Tkinter’s getint() and getdouble() now support Tcl_Obj.Tkinter’s getdouble() now supports any numbers (in particular int).
- bpo-22619: Added negative limit support in the traceback module. Based onpatch by Dmitry Kazakov.
- bpo-24094: Fix possible crash in json.encode with poorly behaved dictsubclasses.
- bpo-9246: On POSIX, os.getcwd() now supports paths longer than 1025 bytes.Patch written by William Orr.
- bpo-17445: add difflib.diff_bytes() to support comparison of byte strings(fixes a regression from Python 2).
- bpo-23917: Fall back to sequential compilation when ProcessPoolExecutordoesn’t exist. Patch by Claudiu Popa.
- bpo-23008: Fixed resolving attributes with boolean value is False inpydoc.
- Fix asyncio issue 235: LifoQueue and PriorityQueue’s put didn’t incrementunfinished tasks (this bug was introduced when JoinableQueue was mergedwith Queue).
- bpo-23908: os functions now reject paths with embedded null character onWindows instead of silently truncating them.
- bpo-23728: binascii.crc_hqx() could return an integer outside of the range0-0xffff for empty data.
- bpo-23887: urllib.error.HTTPError now has a proper repr() representation.Patch by Berker Peksag.
- asyncio: New event loop APIs: set_task_factory() and get_task_factory().
- asyncio: async() function is deprecated in favour of ensure_future().
- bpo-24178: asyncio.Lock, Condition, Semaphore, and BoundedSemaphoresupport new ‘async with’ syntax. Contributed by Yury Selivanov.
- bpo-24179: Support ‘async for’ for asyncio.StreamReader. Contributed byYury Selivanov.
- bpo-24184: Add AsyncIterator and AsyncIterable ABCs to collections.abc.Contributed by Yury Selivanov.
- bpo-22547: Implement informative __repr__ for inspect.BoundArguments.Contributed by Yury Selivanov.
- bpo-24190: Implement inspect.BoundArgument.apply_defaults() method.Contributed by Yury Selivanov.
- bpo-20691: Add ‘follow_wrapped’ argument toinspect.Signature.from_callable() and inspect.signature(). Contributed byYury Selivanov.
- bpo-24248: Deprecate inspect.Signature.from_function() andinspect.Signature.from_builtin().
- bpo-23898: Fix inspect.classify_class_attrs() to support attributes withoverloaded __eq__ and __bool__. Patch by Mike Bayer.
- bpo-24298: Fix inspect.signature() to correctly unwrap wrappers aroundbound methods.
Tests¶
Documentation¶
Tools/Demos¶
- bpo-24000: Improved Argument Clinic’s mapping of converters to legacy“format units”. Updated the documentation to match.
- bpo-24001: Argument Clinic converters now use accept={type} instead oftypes={‘type’} to specify the types the converter accepts.
- bpo-23330: h2py now supports arbitrary filenames in #include.
- bpo-24031: make patchcheck now supports git checkouts, too.
Python 3.5.0 alpha 4¶
Release date: 2015-04-19
Core and Builtins¶
- bpo-22980: Under Linux, GNU/KFreeBSD and the Hurd, C extensions nowinclude the architecture triplet in the extension name, to make it easy totest builds for different ABIs in the same working tree. Under OS X, theextension name now includes PEP 3149-style information.
- bpo-22631: Added Linux-specific socket constant CAN_RAW_FD_FRAMES. Patchcourtesy of Joe Jevnik.
- bpo-23731: Implement PEP 488: removal of .pyo files.
- bpo-23726: Don’t enable GC for user subclasses of non-GC types that don’tadd any new fields. Patch by Eugene Toder.
- bpo-23309: Avoid a deadlock at shutdown if a daemon thread is abortedwhile it is holding a lock to a buffered I/O object, and the main threadtries to use the same I/O object (typically stdout or stderr). A fatalerror is emitted instead.
- bpo-22977: Fixed formatting Windows error messages on Wine. Patch byMartin Panter.
- bpo-23466: %c, %o, %x, and %X in bytes formatting now raise TypeError onnon-integer input.
- bpo-24044: Fix possible null pointer dereference in list.sort in out ofmemory conditions.
- bpo-21354: PyCFunction_New function is exposed by python DLL again.
Library¶
- bpo-23840: tokenize.open() now closes the temporary binary file on errorto fix a resource warning.
- bpo-16914: new debuglevel 2 in smtplib adds timestamps to debug output.
- bpo-7159: urllib.request now supports sending auth credentialsautomatically after the first 401. This enhancement is a superset of theenhancement frombpo-19494 and supersedes that change.
- bpo-23703: Fix a regression in urljoin() introduced in 901e4e52b20a. Patchby Demian Brecht.
- bpo-4254: Adds _curses.update_lines_cols(). Patch by Arnon Yaari
- bpo-19933: Provide default argument for ndigits in round. Patch byVajrasky Kok.
- bpo-23193: Add a numeric_owner parameter to tarfile.TarFile.extract andtarfile.TarFile.extractall. Patch by Michael Vogt and Eric Smith.
- bpo-23342: Add a subprocess.run() function than returns a CalledProcessinstance for a more consistent API than the existing call* functions.
- bpo-21217: inspect.getsourcelines() now tries to compute the start and endlines from the code object, fixing an issue when a lambda function is usedas decorator argument. Patch by Thomas Ballinger and Allison Kaptur.
- bpo-24521: Fix possible integer overflows in the pickle module.
- bpo-22931: Allow ‘[’ and ‘]’ in cookie values.
- The keywords attribute of functools.partial is now always a dictionary.
- bpo-23811: Add missing newline to the PyCompileError error message. Patchby Alex Shkop.
- bpo-21116: Avoid blowing memory when allocating a multiprocessing sharedarray that’s larger than 50% of the available RAM. Patch by MédéricBoquien.
- bpo-22982: Improve BOM handling when seeking to multiple positions of awritable text file.
- bpo-23464: Removed deprecated asyncio JoinableQueue.
- bpo-23529: Limit the size of decompressed data when reading from GzipFile,BZ2File or LZMAFile. This defeats denial of service attacks usingcompressed bombs (i.e. compressed payloads which decompress to a hugesize). Patch by Martin Panter and Nikolaus Rath.
- bpo-21859: Added Python implementation of io.FileIO.
- bpo-23865: close() methods in multiple modules now are idempotent and morerobust at shutdown. If they need to release multiple resources, all arereleased even if errors occur.
- bpo-23400: Raise same exception on both Python 2 and 3 if sem_open is notavailable. Patch by Davin Potts.
- bpo-10838: The subprocess now module includes SubprocessError andTimeoutError in its list of exported names for the users wild enough touse
fromsubprocessimport*. - bpo-23411: Added DefragResult, ParseResult, SplitResult,DefragResultBytes, ParseResultBytes, and SplitResultBytes tourllib.parse.__all__. Patch by Martin Panter.
- bpo-23881: urllib.request.ftpwrapper constructor now closes the socket ifthe FTP connection failed to fix a ResourceWarning.
- bpo-23853:
socket.socket.sendall()does no more reset the sockettimeout each time data is sent successfully. The socket timeout is now themaximum total duration to send all data. - bpo-22721: An order of multiline pprint output of set or dict containingorderable and non-orderable elements no longer depends on iteration orderof set or dict.
- bpo-15133: _tkinter.tkapp.getboolean() now supports Tcl_Obj and alwaysreturns bool. tkinter.BooleanVar now validates input values (acceptedbool, int, str, and Tcl_Obj). tkinter.BooleanVar.get() now always returnsbool.
- bpo-10590: xml.sax.parseString() now supports string argument.
- bpo-23338: Fixed formatting ctypes error messages on Cygwin. Patch byMakoto Kato.
- bpo-15582: inspect.getdoc() now follows inheritance chains.
- bpo-2175: SAX parsers now support a character stream of InputSourceobject.
- bpo-16840: Tkinter now supports 64-bit integers added in Tcl 8.4 andarbitrary precision integers added in Tcl 8.5.
- bpo-23834: Fix socket.sendto(), use the C Py_ssize_t type to store theresult of sendto() instead of the C int type.
- bpo-23618:
socket.socket.connect()now waits until the connectioncompletes instead of raisingInterruptedErrorif the connection isinterrupted by signals, signal handlers don’t raise an exception and thesocket is blocking or has a timeout.socket.socket.connect()stillraiseInterruptedErrorfor non-blocking sockets. - bpo-21526: Tkinter now supports new boolean type in Tcl 8.5.
- bpo-23836: Fix the faulthandler module to handle reentrant calls to itssignal handlers.
- bpo-23838: linecache now clears the cache and returns an empty result onMemoryError.
- bpo-10395: Added os.path.commonpath(). Implemented in posixpath andntpath. Based on patch by Rafik Draoui.
- bpo-23611: Serializing more “lookupable” objects (such as unbound methodsor nested classes) now are supported with pickle protocols < 4.
- bpo-13583: sqlite3.Row now supports slice indexing.
- bpo-18473: Fixed 2to3 and 3to2 compatible pickle mappings. Fixedambigious reverse mappings. Added many new mappings. Import mapping isno longer applied to modules already mapped with full name mapping.
- bpo-23485: select.select() is now retried automatically with therecomputed timeout when interrupted by a signal, except if the signalhandler raises an exception. This change is part of the PEP 475.
- bpo-23752: When built from an existing file descriptor, io.FileIO() nowonly calls fstat() once. Before fstat() was called twice, which was notnecessary.
- bpo-23704: collections.deque() objects now support __add__, __mul__, and__imul__().
- bpo-23171: csv.Writer.writerow() now supports arbitrary iterables.
- bpo-23745: The new email header parser now handles duplicate MIMEparameter names without error, similar to how get_param behaves.
- bpo-22117: Fix os.utime(), it now rounds the timestamp towards minusinfinity (-inf) instead of rounding towards zero.
- bpo-23310: Fix MagicMock’s initializer to work with __methods__, just likeconfigure_mock(). Patch by Kasia Jachim.
Build¶
Tests¶
Tools/Demos¶
- bpo-18128: pygettext now uses standard +NNNN format in thePOT-Creation-Date header.
- bpo-23935: Argument Clinic’s understanding of format units acceptingbytes, bytearrays, and buffers is now consistent with both thedocumentation and the implementation.
- bpo-23944: Argument Clinic now wraps long impl prototypes at column 78.
- bpo-20586: Argument Clinic now ensures that functions without docstringshave signatures.
- bpo-23492: Argument Clinic now generates argument parsing code withPyArg_Parse instead of PyArg_ParseTuple if possible.
- bpo-23500: Argument Clinic is now smarter about generating the “#ifndef”(empty) definition of the methoddef macro: it’s only generated once, evenif Argument Clinic processes the same symbol multiple times, and it’semitted at the end of all processing rather than immediately after thefirst use.
Python 3.5.0 alpha 3¶
Release date: 2015-03-28
Core and Builtins¶
- bpo-23573: Increased performance of string search operations (str.find,str.index, str.count, the in operator, str.split, str.partition) witharguments of different kinds (UCS1, UCS2, UCS4).
- bpo-23753: Python doesn’t support anymore platforms without stat() orfstat(), these functions are always required.
- bpo-23681: The -b option now affects comparisons of bytes with int.
- bpo-23632: Memoryviews now allow tuple indexing (including formulti-dimensional memoryviews).
- bpo-23192: Fixed generator lambdas. Patch by Bruno Cauet.
- bpo-23629: Fix the default __sizeof__ implementation for variable-sizedobjects.
Library¶
- bpo-14260: The groupindex attribute of regular expression pattern objectnow is non- modifiable mapping.
- bpo-23792: Ignore KeyboardInterrupt when the pydoc pager is active. Thismimics the behavior of the standard unix pagers, and prevents pipepagerfrom shutting down while the pager itself is still running.
- bpo-23775: pprint() of OrderedDict now outputs the same representation asrepr().
- bpo-23765: Removed IsBadStringPtr calls in ctypes
- bpo-22364: Improved some re error messages using regex for hints.
- bpo-23742: ntpath.expandvars() no longer loses unbalanced single quotes.
- bpo-21717: The zipfile.ZipFile.open function now supports ‘x’ (exclusivecreation) mode.
- bpo-21802: The reader in BufferedRWPair now is closed even when closingwriter failed in BufferedRWPair.close().
- bpo-23622: Unknown escapes in regular expressions that consist of
'\'and ASCII letter now raise a deprecation warning and will be forbidden inPython 3.6. - bpo-23671: string.Template now allows specifying the “self” parameter as akeyword argument. string.Formatter now allows specifying the “self” andthe “format_string” parameters as keyword arguments.
- bpo-23502: The pprint module now supports mapping proxies.
- bpo-17530: pprint now wraps long bytes objects and bytearrays.
- bpo-22687: Fixed some corner cases in breaking words in tetxtwrap. Got ridof quadratic complexity in breaking long words.
- bpo-4727: The copy module now uses pickle protocol 4 (PEP 3154) andsupports copying of instances of classes whose __new__ method takeskeyword-only arguments.
- bpo-23491: Added a zipapp module to support creating executable zip filearchives of Python code. Registered “.pyz” and “.pyzw” extensions onWindows for these archives (PEP 441).
- bpo-23657: Avoid explicit checks for str in zipapp, adding support forpathlib.Path objects as arguments.
- bpo-23688: Added support of arbitrary bytes-like objects and avoidedunnecessary copying of memoryview in gzip.GzipFile.write(). Original patchby Wolfgang Maier.
- bpo-23252: Added support for writing ZIP files to unseekable streams.
- bpo-23647: Increase impalib’s MAXLINE to accommodate modern mailbox sizes.
- bpo-23539: If body is None, http.client.HTTPConnection.request now setsContent-Length to 0 for PUT, POST, and PATCH headers to avoid 411 errorsfrom some web servers.
- bpo-22351: The nntplib.NNTP constructor no longer leaves the connectionand socket open until the garbage collector cleans them up. Patch byMartin Panter.
- bpo-23704: collections.deque() objects now support methods for index(),insert(), and copy(). This allows deques to be registered as aMutableSequence and it improves their substitutability for lists.
- bpo-23715:
signal.sigwaitinfo()andsignal.sigtimedwait()arenow retried when interrupted by a signal not in thesigset parameter, ifthe signal handler does not raise an exception. signal.sigtimedwait()recomputes the timeout with a monotonic clock when it is retried. - bpo-23001: Few functions in modules mmap, ossaudiodev, socket, ssl, andcodecs, that accepted only read-only bytes-like object now accept writablebytes-like object too.
- bpo-23646: If time.sleep() is interrupted by a signal, the sleep is nowretried with the recomputed delay, except if the signal handler raises anexception (PEP 475).
- bpo-23136: _strptime now uniformly handles all days in week 0, includingDec 30 of previous year. Based on patch by Jim Carroll.
- bpo-23700: Iterator of NamedTemporaryFile now keeps a reference toNamedTemporaryFile instance. Patch by Bohuslav Kabrda.
- bpo-22903: The fake test case created by unittest.loader when it failsimporting a test module is now picklable.
- bpo-22181: On Linux, os.urandom() now uses the new getrandom() syscall ifavailable, syscall introduced in the Linux kernel 3.17. It is morereliable and more secure, because it avoids the need of a file descriptorand waits until the kernel has enough entropy.
- bpo-2211: Updated the implementation of the http.cookies.Morsel class.Setting attributes key, value and coded_value directly now is deprecated.update() and setdefault() now transform and check keys. Comparing forequality now takes into account attributes key, value and coded_value.copy() now returns a Morsel, not a dict. repr() now contains allattributes. Optimized checking keys and quoting values. Added new tests.Original patch by Demian Brecht.
- bpo-18983: Allow selection of output units in timeit. Patch by JulianGindi.
- bpo-23631: Fix traceback.format_list when a traceback has been mutated.
- bpo-23568: Add rdivmod support to MagicMock() objects. Patch by HåkanLövdahl.
- bpo-2052: Add charset parameter to HtmlDiff.make_file().
- bpo-23668: Support os.truncate and os.ftruncate on Windows.
- bpo-23138: Fixed parsing cookies with absent keys or values in cookiejar.Patch by Demian Brecht.
- bpo-23051: multiprocessing.Pool methods imap() and imap_unordered() nowhandle exceptions raised by an iterator. Patch by Alon Diamant and DavinPotts.
- bpo-23581: Add matmul support to MagicMock. Patch by Håkan Lövdahl.
- bpo-23566: enable(), register(), dump_traceback() anddump_traceback_later() functions of faulthandler now accept filedescriptors. Patch by Wei Wu.
- bpo-22928: Disabled HTTP header injections in http.client. Original patchby Demian Brecht.
- bpo-23615: Modules bz2, tarfile and tokenize now can be reloaded withimp.reload(). Patch by Thomas Kluyver.
- bpo-23605: os.walk() now calls os.scandir() instead of os.listdir(). Theusage of os.scandir() reduces the number of calls to os.stat(). Initialpatch written by Ben Hoyt.
Tests¶
Python 3.5.0 alpha 2¶
Release date: 2015-03-09
Core and Builtins¶
- bpo-23571: PyObject_Call() and PyCFunction_Call() now raise a SystemErrorif a function returns a result and raises an exception. The SystemError ischained to the previous exception.
Library¶
bpo-22524: New os.scandir() function, part of the PEP 471: “os.scandir()function – a better and faster directory iterator”. Patch written by BenHoyt.
bpo-23103: Reduced the memory consumption of IPv4Address and IPv6Address.
bpo-21793: BaseHTTPRequestHandler again logs response code as numeric, notas stringified enum. Patch by Demian Brecht.
bpo-23476: In the ssl module, enable OpenSSL’s X509_V_FLAG_TRUSTED_FIRSTflag on certificate stores when it is available.
bpo-23576: Avoid stalling in SSL reads when EOF has been reached in theSSL layer but the underlying connection hasn’t been closed.
bpo-23504: Added an __all__ to the types module.
bpo-23563: Optimized utility functions in urllib.parse.
bpo-7830: Flatten nested functools.partial.
bpo-20204: Added the __module__ attribute to _tkinter classes.
bpo-19980: Improved help() for non-recognized strings. help(‘’) now showsthe help on str. help(‘help’) now shows the help on help(). Originalpatch by Mark Lawrence.
bpo-23521: Corrected pure python implementation of timedelta division.
Eliminated OverflowError from
timedelta*floatfor some floats;Corrected rounding in timedlta true division.bpo-21619: Popen objects no longer leave a zombie after exit in the withstatement if the pipe was broken. Patch by Martin Panter.
bpo-22936: Make it possible to show local variables in tracebacks for boththe traceback module and unittest.
bpo-15955: Add an option to limit the output size in bz2.decompress().Patch by Nikolaus Rath.
bpo-6639: Module-level turtle functions no longer raise TclError afterclosing the window.
bpo-814253: Group references and conditional group references now work inlookbehind assertions in regular expressions. (See also:bpo-9179)
bpo-23215: Multibyte codecs with custom error handlers that ignores errorsconsumed too much memory and raised SystemError or MemoryError. Originalpatch by Aleksi Torhamo.
bpo-5700: io.FileIO() called flush() after closing the file. flush() wasnot called in close() if closefd=False.
bpo-23374: Fixed pydoc failure with non-ASCII files when stdout encodingdiffers from file system encoding (e.g. on Mac OS).
bpo-23481: Remove RC4 from the SSL module’s default cipher list.
bpo-21548: Fix pydoc.synopsis() and pydoc.apropos() on modules with emptydocstrings.
bpo-22885: Fixed arbitrary code execution vulnerability in the dbm.dumbmodule. Original patch by Claudiu Popa.
bpo-23239: ssl.match_hostname() now supports matching of IP addresses.
bpo-23146: Fix mishandling of absolute Windows paths with forward slashesin pathlib.
bpo-23096: Pickle representation of floats with protocol 0 now is the samefor both Python and C implementations.
bpo-19105: pprint now more efficiently uses free space at the right.
bpo-14910: Add allow_abbrev parameter to argparse.ArgumentParser. Patch byJonathan Paugh, Steven Bethard, paul j3 and Daniel Eriksson.
bpo-21717: tarfile.open() now supports ‘x’ (exclusive creation) mode.
bpo-23344: marshal.dumps() is now 20-25% faster on average.
bpo-20416: marshal.dumps() with protocols 3 and 4 is now 40-50% faster onaverage.
bpo-23421: Fixed compression in tarfile CLI. Patch by wdv4758h.
bpo-23367: Fix possible overflows in the unicodedata module.
bpo-23361: Fix possible overflow in Windows subprocess creation code.
logging.handlers.QueueListener now takes a respect_handler_level keywordargument which, if set to True, will pass messages to handlers takinghandler levels into account.
bpo-19705: turtledemo now has a visual sorting algorithm demo. Originalpatch from Jason Yeo.
bpo-23801: Fix issue where cgi.FieldStorage did not always ignore theentire preamble to a multipart body.
Build¶
Python 3.5.0 alpha 1¶
Release date: 2015-02-08
Core and Builtins¶
- bpo-23285: PEP 475 - EINTR handling.
- bpo-22735: Fix many edge cases (including crashes) involving custom mro()implementations.
- bpo-22896: Avoid using PyObject_AsCharBuffer(), PyObject_AsReadBuffer()and PyObject_AsWriteBuffer().
- bpo-21295: Revert some changes (bpo-16795) to AST line numbers andcolumn offsets that constituted a regression.
- bpo-22986: Allow changing an object’s __class__ between a dynamic type andstatic type in some cases.
- bpo-15859: PyUnicode_EncodeFSDefault(), PyUnicode_EncodeMBCS() andPyUnicode_EncodeCodePage() now raise an exception if the object is not aUnicode object. For PyUnicode_EncodeFSDefault(), it was already the caseon platforms other than Windows. Patch written by Campbell Barton.
- bpo-21408: The default __ne__() now returns NotImplemented if __eq__()returned NotImplemented. Original patch by Martin Panter.
- bpo-23321: Fixed a crash in str.decode() when error handler returnedreplacment string longer than mailformed input data.
- bpo-22286: The “backslashreplace” error handlers now works with decodingand translating.
- bpo-23253: Delay-load ShellExecute[AW] in os.startfile for reduced startupoverhead on Windows.
- bpo-22038: pyatomic.h now uses stdatomic.h or GCC built-in functions foratomic memory access if available. Patch written by Vitor de Lima andGustavo Temple.
- bpo-20284: %-interpolation (aka printf) formatting added for bytes andbytearray.
- bpo-23048: Fix jumping out of an infinite while loop in the pdb.
- bpo-20335: bytes constructor now raises TypeError when encoding or errorsis specified with non-string argument. Based on patch by Renaud Blanch.
- bpo-22834: If the current working directory ends up being set to anon-existent directory then import will no longer raise FileNotFoundError.
- bpo-22869: Move the interpreter startup & shutdown code to a new dedicatedpylifecycle.c module
- bpo-22847: Improve method cache efficiency.
- bpo-22335: Fix crash when trying to enlarge a bytearray to 0x7fffffffbytes on a 32-bit platform.
- bpo-22653: Fix an assertion failure in debug mode when doing a reentrantdict insertion in debug mode.
- bpo-22643: Fix integer overflow in Unicode case operations (upper, lower,title, swapcase, casefold).
- bpo-17636: Circular imports involving relative imports are now supported.
- bpo-22604: Fix assertion error in debug mode when dividing a complexnumber by (nan+0j).
- bpo-21052: Do not raise ImportWarning when sys.path_hooks or sys.meta_pathare set to None.
- bpo-16518: Use ‘bytes-like object required’ in error messages thatpreviously used the far more cryptic “‘x’ does not support the bufferprotocol.
- bpo-22470: Fixed integer overflow issues in “backslashreplace”,“xmlcharrefreplace”, and “surrogatepass” error handlers.
- bpo-22540: speed up
PyObject_IsInstanceandPyObject_IsSubclassin thecommon case that the second argument has metaclasstype. - bpo-18711: Add a new
PyErr_FormatVfunction, similar toPyErr_Formatbut accepting ava_listargument. - bpo-22520: Fix overflow checking when generating the repr of a unicodeobject.
- bpo-22519: Fix overflow checking in PyBytes_Repr.
- bpo-22518: Fix integer overflow issues in latin-1 encoding.
- bpo-16324: _charset parameter of MIMEText now also acceptsemail.charset.Charset instances. Initial patch by Claude Paroz.
- bpo-1764286: Fix inspect.getsource() to support decorated functions. Patchby Claudiu Popa.
- bpo-18554: os.__all__ includes posix functions.
- bpo-21391: Use os.path.abspath in the shutil module.
- bpo-11471: avoid generating a JUMP_FORWARD instruction at the end of anif-block if there is no else-clause. Original patch by Eugene Toder.
- bpo-22215: Now ValueError is raised instead of TypeError when str or bytesargument contains not permitted null character or byte.
- bpo-22258: Fix the internal function set_inheritable() on Illumos. Thisplatform exposes the function
ioctl(FIOCLEX), but calling it failswith errno is ENOTTY: “Inappropriate ioctl for device”. set_inheritable()now falls back to the slowerfcntl()(F_GETFDand thenF_SETFD). - bpo-21389: Displaying the __qualname__ of the underlying function in therepr of a bound method.
- bpo-22206: Using pthread, PyThread_create_key() now sets errno to ENOMEMand returns -1 (error) on integer overflow.
- bpo-20184: Argument Clinic based signature introspection added for 30 ofthe builtin functions.
- bpo-22116: C functions and methods (of the ‘builtin_function_or_method’type) can now be weakref’ed. Patch by Wei Wu.
- bpo-22077: Improve index error messages for bytearrays, bytes, lists, andtuples by adding ‘or slices’. Added ‘, not <typename>’ for bytearrays.Original patch by Claudiu Popa.
- bpo-20179: Apply Argument Clinic to bytes and bytearray. Patch by TalEinat.
- bpo-22082: Clear interned strings in slotdefs.
- Upgrade Unicode database to Unicode 7.0.0.
- bpo-21897: Fix a crash with the f_locals attribute with closure variableswhen frame.clear() has been called.
- bpo-21205: Add a new
__qualname__attribute to generator, thequalified name, and use it in the representation of a generator(repr(gen)). The default name of the generator (__name__attribute) is now get from the function instead of the code. Usegen.gi_code.co_nameto get the name of the code. - bpo-21669: With the aid of heuristics in SyntaxError.__init__, the parsernow attempts to generate more meaningful (or at least more search enginefriendly) error messages when “exec” and “print” are used as statements.
- bpo-21642: In the conditional if-else expression, allow an integer writtenwith no space between itself and the
elsekeyword (e.g.Trueif42elseFalse) to be valid syntax. - bpo-21523: Fix over-pessimistic computation of the stack effect of someopcodes in the compiler. This also fixes a quadratic compilation timeissue noticeable when compiling code with a large number of “and” and “or”operators.
- bpo-21418: Fix a crash in the builtin function super() when called withoutargument and without current frame (ex: embedded Python).
- bpo-21425: Fix flushing of standard streams in the interactiveinterpreter.
- bpo-21435: In rare cases, when running finalizers on objects in cyclictrash a bad pointer dereference could occur due to a subtle flaw ininternal iteration logic.
- bpo-21377: PyBytes_Concat() now tries to concatenate in-place when thefirst argument has a reference count of 1. Patch by Nikolaus Rath.
- bpo-20355: -W command line options now have higher priority than thePYTHONWARNINGS environment variable. Patch by Arfrever.
- bpo-21274: Define PATH_MAX for GNU/Hurd in Python/pythonrun.c.
- bpo-20904: Support setting FPU precision on m68k.
- bpo-21209: Fix sending tuples to custom generator objects with the yieldfrom syntax.
- bpo-21193: pow(a, b, c) now raises ValueError rather than TypeError when bis negative. Patch by Josh Rosenberg.
- bpo-21176: PEP 465: Add the ‘@’ operator for matrix multiplication.
- bpo-21134: Fix segfault when str is called on an uninitializedUnicodeEncodeError, UnicodeDecodeError, or UnicodeTranslateError object.
- bpo-19537: Fix PyUnicode_DATA() alignment under m68k. Patch by AndreasSchwab.
- bpo-20929: Add a type cast to avoid shifting a negative number.
- bpo-20731: Properly position in source code files even if they are openedin text mode. Patch by Serhiy Storchaka.
- bpo-20637: Key-sharing now also works for instance dictionaries ofsubclasses. Patch by Peter Ingebretson.
- bpo-8297: Attributes missing from modules now include the module name inthe error text. Original patch by ysj.ray.
- bpo-19995: %c, %o, %x, and %X now raise TypeError on non-integer input.
- bpo-19655: The ASDL parser - used by the build process to generate codefor managing the Python AST in C - was rewritten. The new parser is selfcontained and does not require to carry long the spark.py parser-generatorlibrary; spark.py was removed from the source base.
- bpo-12546: Allow
\x00to be used as a fill character when using str,int, float, and complex __format__ methods. - bpo-20480: Add ipaddress.reverse_pointer. Patch by Leon Weber.
- bpo-13598: Modify string.Formatter to support auto-numbering ofreplacement fields. It now matches the behavior of str.format() in thisregard. Patches by Phil Elson and Ramchandra Apte.
- bpo-8931: Make alternate formatting (‘#’) for type ‘c’ raise an exception.In versions prior to 3.5, ‘#’ with ‘c’ had no effect. Now specifying it isan error. Patch by Torsten Landschoff.
- bpo-23165: Perform overflow checks before allocating memory in the_Py_char2wchar function.
Library¶
- bpo-23399: pyvenv creates relative symlinks where possible.
- bpo-20289: cgi.FieldStorage() now supports the context managementprotocol.
- bpo-13128: Print response headers for CONNECT requests when debuglevel >0. Patch by Demian Brecht.
- bpo-15381: Optimized io.BytesIO to make less allocations and copyings.
- bpo-22818: Splitting on a pattern that could match an empty string nowraises a warning. Patterns that can only match empty strings are nowrejected.
- bpo-23099: Closing io.BytesIO with exported buffer is rejected now toprevent corrupting exported buffer.
- bpo-23326: Removed __ne__ implementations. Since fixing default __ne__implementation inbpo-21408 they are redundant.
- bpo-23363: Fix possible overflow in itertools.permutations.
- bpo-23364: Fix possible overflow in itertools.product.
- bpo-23366: Fixed possible integer overflow in itertools.combinations.
- bpo-23369: Fixed possible integer overflow in_json.encode_basestring_ascii.
- bpo-23353: Fix the exception handling of generators inPyEval_EvalFrameEx(). At entry, save or swap the exception state even ifPyEval_EvalFrameEx() is called with throwflag=0. At exit, the exceptionstate is now always restored or swapped, not only if why is WHY_YIELD orWHY_RETURN. Patch co-written with Antoine Pitrou.
- bpo-14099: Restored support of writing ZIP files to tellable butnon-seekable streams.
- bpo-14099: Writing to ZipFile and reading multiple ZipExtFiles isthreadsafe now.
- bpo-19361: JSON decoder now raises JSONDecodeError instead of ValueError.
- bpo-18518: timeit now rejects statements which can’t be compiled outside afunction or a loop (e.g. “return” or “break”).
- bpo-23094: Fixed readline with frames in Python implementation of pickle.
- bpo-23268: Fixed bugs in the comparison of ipaddress classes.
- bpo-21408: Removed incorrect implementations of __ne__() which didn’treturned NotImplemented if __eq__() returned NotImplemented. The default__ne__() now works correctly.
- bpo-19996:
email.feedparser.FeedParsernow handles (malformed)headers with no key rather than assuming the body has started. - bpo-20188: Support Application-Layer Protocol Negotiation (ALPN) in thessl module.
- bpo-23133: Pickling of ipaddress objects now produces more compact andportable representation.
- bpo-23248: Update ssl error codes from latest OpenSSL git master.
- bpo-23266: Much faster implementation of ipaddress.collapse_addresses()when there are many non-consecutive addresses.
- bpo-23098: 64-bit dev_t is now supported in the os module.
- bpo-21817: When an exception is raised in a task submitted to aProcessPoolExecutor, the remote traceback is now displayed in the parentprocess. Patch by Claudiu Popa.
- bpo-15955: Add an option to limit output size when decompressing LZMAdata. Patch by Nikolaus Rath and Martin Panter.
- bpo-23250: In the http.cookies module, capitalize “HttpOnly” and “Secure”as they are written in the standard.
- bpo-23063: In the disutils’ check command, fix parsing of reST with codeor code-block directives.
- bpo-23209: selectors.BaseSelector.get_key() now raises a RuntimeError ifthe selector is closed. And selectors.BaseSelector.close() now clears itsinternal reference to the selector mapping to break a reference cycle.Initial patch written by Martin Richard. (See also:bpo-23225)
- bpo-17911: Provide a way to seed the linecache for a PEP-302 modulewithout actually loading the code.
- bpo-17911: Provide a new object API for traceback, including the abilityto not lookup lines at all until the traceback is actually rendered,without any trace of the original objects being kept alive.
- bpo-19777: Provide a home() classmethod on Path objects. Contributed byVictor Salgado and Mayank Tripathi.
- bpo-23206: Make
json.dumps(...,ensure_ascii=False)as fast as thedefault case ofensure_ascii=True. Patch by Naoki Inada. - bpo-23185: Add math.inf and math.nan constants.
- bpo-23186: Add ssl.SSLObject.shared_ciphers() andssl.SSLSocket.shared_ciphers() to fetch the client’s list ciphers sent athandshake.
- bpo-23143: Remove compatibility with OpenSSLs older than 0.9.8.
- bpo-23132: Improve performance and introspection support of comparisonmethods created by functool.total_ordering.
- bpo-19776: Add an expanduser() method on Path objects.
- bpo-23112: Fix SimpleHTTPServer to correctly carry the query string andfragment when it redirects to add a trailing slash.
- bpo-21793: Added http.HTTPStatus enums (i.e. HTTPStatus.OK,HTTPStatus.NOT_FOUND). Patch by Demian Brecht.
- bpo-23093: In the io, module allow more operations to work on detachedstreams.
- bpo-23111: In the ftplib, make ssl.PROTOCOL_SSLv23 the default protocolversion.
- bpo-22585: On OpenBSD 5.6 and newer, os.urandom() now calls getentropy(),instead of reading /dev/urandom, to get pseudo-random bytes.
- bpo-19104: pprint now produces evaluable output for wrapped strings.
- bpo-23071: Added missing names to codecs.__all__. Patch by Martin Panter.
- bpo-22783: Pickling now uses the NEWOBJ opcode instead of the NEWOBJ_EXopcode if possible.
- bpo-15513: Added a __sizeof__ implementation for pickle classes.
- bpo-19858: pickletools.optimize() now aware of the MEMOIZE opcode, canproduce more compact result and no longer produces invalid output if inputdata contains MEMOIZE opcodes together with PUT or BINPUT opcodes.
- bpo-22095: Fixed HTTPConnection.set_tunnel with default port. The portvalue in the host header was set to “None”. Patch by Demian Brecht.
- bpo-23016: A warning no longer produces an AttributeError when the programis run with pythonw.exe.
- bpo-21775: shutil.copytree(): fix crash when copying to VFAT. An exceptionhandler assumed that OSError objects always have a ‘winerror’ attribute.That is not the case, so the exception handler itself raisedAttributeError when run on Linux (and, presumably, any other non-WindowsOS). Patch by Greg Ward.
- bpo-1218234: Fix inspect.getsource() to load updated source of reloadedmodule. Initial patch by Berker Peksag.
- bpo-21740: Support wrapped callables in doctest. Patch by Claudiu Popa.
- bpo-23009: Make sure selectors.EpollSelecrtor.select() works when no FD isregistered.
- bpo-22959: In the constructor of http.client.HTTPSConnection, prefer thecontext’s check_hostname attribute over thecheck_hostname parameter.
- bpo-22696: Add function
sys.is_finalizing()to know aboutinterpreter shutdown. - bpo-16043: Add a default limit for the amount of dataxmlrpclib.gzip_decode will return. This resolves CVE-2013-1753.
- bpo-14099: ZipFile.open() no longer reopen the underlying file. Objectsreturned by ZipFile.open() can now operate independently of the ZipFileeven if the ZipFile was created by passing in a file-like object as thefirst argument to the constructor.
- bpo-22966: Fix __pycache__ pyc file name clobber when pyc_compile is askedto compile a source file containing multiple dots in the source file name.
- bpo-21971: Update turtledemo doc and add module to the index.
- bpo-21032: Fixed socket leak if HTTPConnection.getresponse() fails.Original patch by Martin Panter.
- bpo-22407: Deprecated the use of re.LOCALE flag with str patterns orre.ASCII. It was newer worked.
- bpo-22902: The “ip” command is now used on Linux to determine MAC addressin uuid.getnode(). Pach by Bruno Cauet.
- bpo-22960: Add a context argument to xmlrpclib.ServerProxy constructor.
- bpo-22389: Add contextlib.redirect_stderr().
- bpo-21356: Make ssl.RAND_egd() optional to support LibreSSL. Theavailability of the function is checked during the compilation. Patchwritten by Bernard Spil.
- bpo-22915: SAX parser now supports files opened with file descriptor orbytes path.
- bpo-22609: Constructors and update methods of mapping classes in thecollections module now accept the self keyword argument.
- bpo-22940: Add readline.append_history_file.
- bpo-19676: Added the “namereplace” error handler.
- bpo-22788: Addcontext parameter to logging.handlers.HTTPHandler.
- bpo-22921: Allow SSLContext to take thehostname parameter even ifOpenSSL doesn’t support SNI.
- bpo-22894: TestCase.subTest() would cause the test suite to be stoppedwhen in failfast mode, even in the absence of failures.
- bpo-22796: HTTP cookie parsing is now stricter, in order to protectagainst potential injection attacks.
- bpo-22370: Windows detection in pathlib is now more robust.
- bpo-22841: Reject coroutines in asyncio add_signal_handler(). Patch byLudovic.Gasc.
- bpo-19494: Added urllib.request.HTTPBasicPriorAuthHandler. Patch by MatejCepl.
- bpo-22578: Added attributes to the re.error class.
- bpo-22849: Fix possible double free in the io.TextIOWrapper constructor.
- bpo-12728: Different Unicode characters having the same uppercase butdifferent lowercase are now matched in case-insensitive regularexpressions.
- bpo-22821: Fixed fcntl() with integer argument on 64-bit big-endianplatforms.
- bpo-21650: Add an
--sort-keysoption to json.tool CLI. - bpo-22824: Updated reprlib output format for sets to use set literals.Patch contributed by Berker Peksag.
- bpo-22824: Updated reprlib output format for arrays to display emptyarrays without an unnecessary empty list. Suggested by Serhiy Storchaka.
- bpo-22406: Fixed the uu_codec codec incorrectly ported to 3.x. Based onpatch by Martin Panter.
- bpo-17293: uuid.getnode() now determines MAC address on AIX using netstat.Based on patch by Aivars Kalvāns.
- bpo-22769: Fixed ttk.Treeview.tag_has() when called without arguments.
- bpo-22417: Verify certificates by default in httplib (PEP 476).
- bpo-22775: Fixed unpickling of http.cookies.SimpleCookie with protocol 2and above. Patch by Tim Graham.
- bpo-22776: Brought excluded code into the scope of a try block inSysLogHandler.emit().
- bpo-22665: Add missing get_terminal_size and SameFileError toshutil.__all__.
- bpo-6623: Remove deprecated Netrc class in the ftplib module. Patch byMatt Chaput.
- bpo-17381: Fixed handling of case-insensitive ranges in regularexpressions.
- bpo-22410: Module level functions in the re module now cache compiledlocale-dependent regular expressions taking into account the locale.
- bpo-22759: Query methods on pathlib.Path() (exists(), is_dir(), etc.) nowreturn False when the underlying stat call raises NotADirectoryError.
- bpo-8876: distutils now falls back to copying files when hard linkingdoesn’t work. This allows use with special filesystems such as VirtualBoxshared folders.
- bpo-22217: Implemented reprs of classes in the zipfile module.
- bpo-22457: Honour load_tests in the start_dir of discovery.
- bpo-18216: gettext now raises an error when a .mo file has an unsupportedmajor version number. Patch by Aaron Hill.
- bpo-13918: Provide a locale.delocalize() function which can removelocale-specific number formatting from a string representing a number,without then converting it to a specific type. Patch by Cédric Krier.
- bpo-22676: Make the pickling of global objects which don’t have a__module__ attribute less slow.
- bpo-18853: Fixed ResourceWarning in shlex.__nain__.
- bpo-9351: Defaults set with set_defaults on an argparse subparser are nolonger ignored when also set on the parent parser.
- bpo-7559: unittest test loading ImportErrors are reported as import errorswith their import exception rather than as attribute errors after theimport has already failed.
- bpo-19746: Make it possible to examine the errors from unittest discoverywithout executing the test suite. The new
errorsattribute on TestLoaderexposes these non-fatal errors encountered during discovery. - bpo-21991: Make email.headerregistry’s header ‘params’ attributes beread-only (MappingProxyType). Previously the dictionary was modifiablebut a new one was created on each access of the attribute.
- bpo-22638: SSLv3 is now disabled throughout the standard library. It canstill be enabled by instantiating a SSLContext manually.
- bpo-22641: In asyncio, the default SSL context for client connections isnow created using ssl.create_default_context(), for stronger security.
- bpo-17401: Include closefd in io.FileIO repr.
- bpo-21338: Add silent mode for compileall. quiet parameters ofcompile_{dir, file, path} functions now have a multilevel value. Also, -qoption of the CLI now have a multilevel value. Patch by Thomas Kluyver.
- bpo-20152: Convert the array and cmath modules to Argument Clinic.
- bpo-18643: Add socket.socketpair() on Windows.
- bpo-22435: Fix a file descriptor leak when socketserver bind fails.
- bpo-13096: Fixed segfault in CTypes POINTER handling of large values.
- bpo-11694: Raise ConversionError in xdrlib as documented. Patch by FilipGruszczyński and Claudiu Popa.
- bpo-19380: Optimized parsing of regular expressions.
- bpo-1519638: Now unmatched groups are replaced with empty strings inre.sub() and re.subn().
- bpo-18615: sndhdr.what/whathdr now return a namedtuple.
- bpo-22462: Fix pyexpat’s creation of a dummy frame to make it appear inexception tracebacks.
- bpo-21965: Add support for in-memory SSL to the ssl module. Patch byGeert Jansen.
- bpo-21173: Fix len() on a WeakKeyDictionary when .clear() was called withan iterator alive.
- bpo-11866: Eliminated race condition in the computation of names for newthreads.
- bpo-21905: Avoid RuntimeError in pickle.whichmodule() when sys.modules ismutated while iterating. Patch by Olivier Grisel.
- bpo-11271: concurrent.futures.Executor.map() now takes achunksizeargument to allow batching of tasks in child processes and improveperformance of ProcessPoolExecutor. Patch by Dan O’Reilly.
- bpo-21883: os.path.join() and os.path.relpath() now raise a TypeError withmore helpful error message for unsupported or mismatched types ofarguments.
- bpo-22219: The zipfile module CLI now adds entries for directories(including empty directories) in ZIP file.
- bpo-22449: In the ssl.SSLContext.load_default_certs, consult theenvironmental variables SSL_CERT_DIR and SSL_CERT_FILE on Windows.
- bpo-22508: The email.__version__ variable has been removed; the email codeis no longer shipped separately from the stdlib, and __version__ hasn’tbeen updated in several releases.
- bpo-20076: Added non derived UTF-8 aliases to locale aliases table.
- bpo-20079: Added locales supported in glibc 2.18 to locale alias table.
- bpo-20218: Added convenience methods read_text/write_text and read_bytes/write_bytes to pathlib.Path objects.
- bpo-22396: On 32-bit AIX platform, don’t expose os.posix_fadvise() noros.posix_fallocate() because their prototypes in system headers are wrong.
- bpo-22517: When an io.BufferedRWPair object is deallocated, clear itsweakrefs.
- bpo-22437: Number of capturing groups in regular expression is no longerlimited by 100.
- bpo-17442: InteractiveInterpreter now displays the full chained tracebackin its showtraceback method, to match the built in interactiveinterpreter.
- bpo-23392: Added tests for marshal C API that works with FILE*.
- bpo-10510: distutils register and upload methods now use HTML standardscompliant CRLF line endings.
- bpo-9850: Fixed macpath.join() for empty first component. Patch by OlegOshmyan.
- bpo-5309: distutils’ build and build_ext commands now accept a
-joption to enable parallel building of extension modules. - bpo-22448: Improve canceled timer handles cleanup to prevent unboundmemory usage. Patch by Joshua Moore-Oliva.
- bpo-22427: TemporaryDirectory no longer attempts to clean up twice whenused in the with statement in generator.
- bpo-22362: Forbidden ambiguous octal escapes out of range 0-0o377 inregular expressions.
- bpo-20912: Now directories added to ZIP file have correct Unix and MS-DOSdirectory attributes.
- bpo-21866: ZipFile.close() no longer writes ZIP64 central directoryrecords if allowZip64 is false.
- bpo-22278: Fix urljoin problem with relative urls, a regression observedafter changes to issue22118 were submitted.
- bpo-22415: Fixed debugging output of the GROUPREF_EXISTS opcode in the remodule. Removed trailing spaces in debugging output.
- bpo-22423: Unhandled exception in thread no longer causes unhandledAttributeError when sys.stderr is None.
- bpo-21332: Ensure that
bufsize=1in subprocess.Popen() selects linebuffering, rather than block buffering. Patch by Akira Li. - bpo-21091: Fix API bug: email.message.EmailMessage.is_attachment is now amethod.
- bpo-21079: Fix email.message.EmailMessage.is_attachment to return thecorrect result when the header has parameters as well as a value.
- bpo-22247: Add NNTPError to nntplib.__all__.
- bpo-22366: urllib.request.urlopen will accept a context object(SSLContext) as an argument which will then be used for HTTPS connection.Patch by Alex Gaynor.
- bpo-4180: The warnings registries are now reset when the filters aremodified.
- bpo-22419: Limit the length of incoming HTTP request in wsgiref server to65536 bytes and send a 414 error code for higher lengths. Patchcontributed by Devin Cook.
- Lax cookie parsing in http.cookies could be a security issue when combinedwith non-standard cookie handling in some Web browsers. Reported bySergey Bobrov.
- bpo-20537: logging methods now accept an exception instance as well as aBoolean value or exception tuple. Thanks to Yury Selivanov for the patch.
- bpo-22384: An exception in Tkinter callback no longer crashes the programwhen it is run with pythonw.exe.
- bpo-22168: Prevent turtle AttributeError with non-default Canvas on OS X.
- bpo-21147: sqlite3 now raises an exception if the request contains a nullcharacter instead of truncating it. Based on patch by Victor Stinner.
- bpo-13968: The glob module now supports recursive search in subdirectoriesusing the
**pattern. - bpo-21951: Fixed a crash in Tkinter on AIX when called Tcl command withempty string or tuple argument.
- bpo-21951: Tkinter now most likely raises MemoryError instead of crash ifthe memory allocation fails.
- bpo-22338: Fix a crash in the json module on memory allocation failure.
- bpo-12410: imaplib.IMAP4 now supports the context management protocol.Original patch by Tarek Ziadé.
- bpo-21270: We now override tuple methods in mock.call objects so that theycan be used as normal call attributes.
- bpo-16662: load_tests() is now unconditionally run when it is present in apackage’s __init__.py. TestLoader.loadTestsFromModule() still acceptsuse_load_tests, but it is deprecated and ignored. A new keyword-onlyattribute
patternis added and documented. Patch given by RobertCollins, tweaked by Barry Warsaw. - bpo-22226: First letter no longer is stripped from the “status” key in theresult of Treeview.heading().
- bpo-19524: Fixed resource leak in the HTTP connection when an invalidresponse is received. Patch by Martin Panter.
- bpo-20421: Add a .version() method to SSL sockets exposing the actualprotocol version in use.
- bpo-19546: configparser exceptions no longer expose implementationdetails. Chained KeyErrors are removed, which leads to cleaner tracebacks.Patch by Claudiu Popa.
- bpo-22051: turtledemo no longer reloads examples to re-run them.Initialization of variables and gui setup should be done in main(), whichis called each time a demo is run, but not on import.
- bpo-21933: Turtledemo users can change the code font size with a menuselection or control(command) ‘-’ or ‘+’ or control-mousewheel. Originalpatch by Lita Cho.
- bpo-21597: The separator between the turtledemo text pane and the drawingcanvas can now be grabbed and dragged with a mouse. The code text panecan be widened to easily view or copy the full width of the text. Thecanvas can be widened on small screens. Original patches by Jan Kanis andLita Cho.
- bpo-18132: Turtledemo buttons no longer disappear when the window isshrunk. Original patches by Jan Kanis and Lita Cho.
- bpo-22043: time.monotonic() is now always available.
threading.Lock.acquire(),threading.RLock.acquire()and socketoperations now use a monotonic clock, instead of the system clock, when atimeout is used. - bpo-21527: Add a default number of workers to ThreadPoolExecutor equal to5 times the number of CPUs. Patch by Claudiu Popa.
- bpo-22216: smtplib now resets its state more completely after a quit. Themost obvious consequence of the previous behavior was a STARTTLS failureduring a connect/starttls/quit/connect/starttls sequence.
- bpo-22098: ctypes’ BigEndianStructure and LittleEndianStructure now definean empty __slots__ so that subclasses don’t always get an instance dict.Patch by Claudiu Popa.
- bpo-22185: Fix an occasional RuntimeError in threading.Condition.wait()caused by mutation of the waiters queue without holding the lock. Patchby Doug Zongker.
- bpo-22287: On UNIX, _PyTime_gettimeofday() now usesclock_gettime(CLOCK_REALTIME) if available. As a side effect, Python nowdepends on the librt library on Solaris and on Linux (only with glibcolder than 2.17).
- bpo-22182: Use e.args to unpack exceptions correctly indistutils.file_util.move_file. Patch by Claudiu Popa.
- The webbrowser module now uses subprocess’s start_new_session=True ratherthan a potentially risky preexec_fn=os.setsid call.
- bpo-22042: signal.set_wakeup_fd(fd) now raises an exception if the filedescriptor is in blocking mode.
- bpo-16808: inspect.stack() now returns a named tuple instead of a tuple.Patch by Daniel Shahaf.
- bpo-22236: Fixed Tkinter images copying operations in NoDefaultRoot mode.
- bpo-2527: Add aglobals argument to timeit functions, in order tooverride the globals namespace in which the timed code is executed. Patchby Ben Roberts.
- bpo-22118: Switch urllib.parse to use RFC 3986 semantics for theresolution of relative URLs, rather than RFCs 1808 and 2396. Patch byDemian Brecht.
- bpo-21549: Added the “members” parameter to TarFile.list().
- bpo-19628: Allow compileall recursion depth to be specified with a -roption.
- bpo-15696: Add a __sizeof__ implementation for mmap objects on Windows.
- bpo-22068: Avoided reference loops with Variables and Fonts in Tkinter.
- bpo-22165: SimpleHTTPRequestHandler now supports undecodable file names.
- bpo-15381: Optimized line reading in io.BytesIO.
- bpo-8797: Raise HTTPError on failed Basic Authentication immediately.Initial patch by Sam Bull.
- bpo-20729: Restored the use of lazy iterkeys()/itervalues()/iteritems() inthe mailbox module.
- bpo-21448: Changed FeedParser feed() to avoid O(N**2) behavior whenparsing long line. Original patch by Raymond Hettinger.
- bpo-22184: The functools LRU Cache decorator factory now gives an earlierand clearer error message when the user forgets the required parameters.
- bpo-17923: glob() patterns ending with a slash no longer match non-dirs onAIX. Based on patch by Delhallt.
- bpo-21725: Added support for RFC 6531 (SMTPUTF8) in smtpd.
- bpo-22176: Update the ctypes module’s libffi to v3.1. This release addssupport for the Linux AArch64 and POWERPC ELF ABIv2 little endianarchitectures.
- bpo-5411: Added support for the “xztar” format in the shutil module.
- bpo-21121: Don’t force 3rd party C extensions to be built with-Werror=declaration- after-statement.
- bpo-21975: Fixed crash when using uninitialized sqlite3.Row (in particularwhen unpickling pickled sqlite3.Row). sqlite3.Row is now initialized inthe __new__() method.
- bpo-20170: Convert posixmodule to use Argument Clinic.
- bpo-21539: Add anexists_ok argument to
Pathlib.mkdir()to mimicmkdir-pandos.makedirs()functionality. When true, ignoreFileExistsErrors. Patch by Berker Peksag. - bpo-22127: Bypass IDNA for pure-ASCII host names in the socket module (inparticular for numeric IPs).
- bpo-21047: set the default value for theconvert_charrefs argument ofHTMLParser to True. Patch by Berker Peksag.
- Add an __all__ to html.entities.
- bpo-15114: the strict mode and argument of HTMLParser, HTMLParser.error,and the HTMLParserError exception have been removed.
- bpo-22085: Dropped support of Tk 8.3 in Tkinter.
- bpo-21580: Now Tkinter correctly handles bytes arguments passed to Tk. Inparticular this allows initializing images from binary data.
- bpo-22003: When initialized from a bytes object, io.BytesIO() now defersmaking a copy until it is mutated, improving performance and memory use onsome use cases. Patch by David Wilson.
- bpo-22018: On Windows, signal.set_wakeup_fd() now also supports sockets. Aside effect is that Python depends to the WinSock library.
- bpo-22054: Add os.get_blocking() and os.set_blocking() functions to getand set the blocking mode of a file descriptor (False if the O_NONBLOCKflag is set, True otherwise). These functions are not available onWindows.
- bpo-17172: Make turtledemo start as active on OS X even when run withsubprocess. Patch by Lita Cho.
- bpo-21704: Fix build error for _multiprocessing when semaphores are notavailable. Patch by Arfrever Frehtes Taifersar Arahesis.
- bpo-20173: Convert sha1, sha256, sha512 and md5 to ArgumentClinic. Patchby Vajrasky Kok.
- Fix repr(_socket.socket) on Windows 64-bit: don’t fail with OverflowErroron closed socket. repr(socket.socket) already works fine.
- bpo-22033: Reprs of most Python implemened classes now contain actualclass name instead of hardcoded one.
- bpo-21947: The dis module can now disassemble generator-iterator objectsbased on their gi_code attribute. Patch by Clement Rouault.
- bpo-16133: The asynchat.async_chat.handle_read() method now ignoresBlockingIOError exceptions.
- bpo-22044: Fixed premature DECREF in call_tzinfo_method. Patch by TomFlanagan.
- bpo-19884: readline: Disable the meta modifier key if stdout is not aterminal to not write the ANSI sequence
"\033[1034h"into stdout. Thissequence is used on some terminal (ex: TERM=xterm-256color”) to enablesupport of 8 bit characters. - bpo-4350: Removed a number of out-of-dated and non-working for a long timeTkinter methods.
- bpo-6167: Scrollbar.activate() now returns the name of active element ifthe argument is not specified. Scrollbar.set() now always accepts only 2arguments.
- bpo-15275: Clean up and speed up the ntpath module.
- bpo-21888: plistlib’s load() and loads() now work if the fmt parameter isspecified.
- bpo-22032: __qualname__ instead of __name__ is now always used to formatfully qualified class names of Python implemented classes.
- bpo-22031: Reprs now always use hexadecimal format with the “0x” prefixwhen contain an id in form ” at 0x…”.
- bpo-22018: signal.set_wakeup_fd() now raises an OSError instead of aValueError on
fstat()failure. - bpo-21044: tarfile.open() now handles fileobj with an integer ‘name’attribute. Based on patch by Antoine Pietri.
- bpo-21966: Respect -q command-line option when code module is ran.
- bpo-19076: Don’t pass the redundant ‘file’ argument to self.error().
- bpo-16382: Improve exception message of warnings.warn() for bad category.Initial patch by Phil Elson.
- bpo-21932: os.read() now uses a
Py_ssize_t()type instead ofintfor the size to support reading more than 2 GB at once. OnWindows, the size is truncted to INT_MAX. As any call to os.read(), the OSmay read less bytes than the number of requested bytes. - bpo-21942: Fixed source file viewing in pydoc’s server mode on Windows.
- bpo-11259: asynchat.async_chat().set_terminator() now raises a ValueErrorif the number of received bytes is negative.
- bpo-12523: asynchat.async_chat.push() now raises a TypeError if it doesn’tget a bytes string
- bpo-21707: Add missing kwonlyargcount argument toModuleFinder.replace_paths_in_code().
- bpo-20639: calling Path.with_suffix(‘’) allows removing the suffix again.Patch by July Tikhonov.
- bpo-21714: Disallow the construction of invalid paths usingPath.with_name(). Original patch by Antony Lee.
- bpo-15014: Added ‘auth’ method to smtplib to make implementing authmechanisms simpler, and used it internally in the login method.
- bpo-21151: Fixed a segfault in the winreg module when
Noneis passedas aREG_BINARYvalue to SetValueEx. Patch by John Ehresman. - bpo-21090: io.FileIO.readall() does not ignore I/O errors anymore. Before,it ignored I/O errors if at least the first C call read() succeed.
- bpo-5800: headers parameter of wsgiref.headers.Headers is now optional.Initial patch by Pablo Torres Navarrete and SilentGhost.
- bpo-21781: ssl.RAND_add() now supports strings longer than 2 GB.
- bpo-21679: Prevent extraneous fstat() calls during open(). Patch byBohuslav Kabrda.
- bpo-21863: cProfile now displays the module name of C extension functions,in addition to their own name.
- bpo-11453: asyncore: emit a ResourceWarning when an unclosed file_wrapperobject is destroyed. The destructor now closes the file if needed. Theclose() method can now be called twice: the second call does nothing.
- bpo-21858: Better handling of Python exceptions in the sqlite3 module.
- bpo-21476: Make sure the email.parser.BytesParser TextIOWrapper isdiscarded after parsing, so the input file isn’t unexpectedly closed.
- bpo-20295: imghdr now recognizes OpenEXR format images.
- bpo-21729: Used the “with” statement in the dbm.dumb module to ensurefiles closing. Patch by Claudiu Popa.
- bpo-21491: socketserver: Fix a race condition in child processes reaping.
- bpo-21719: Added the
st_file_attributesfield to os.stat_result onWindows. - bpo-21832: Require named tuple inputs to be exact strings.
- bpo-21722: The distutils “upload” command now exits with a non-zero returncode when uploading fails. Patch by Martin Dengler.
- bpo-21723: asyncio.Queue: support any type of number (ex: float) for themaximum size. Patch written by Vajrasky Kok.
- bpo-21711: support for “site-python” directories has now been removed fromthe site module (it was deprecated in 3.4).
- bpo-17552: new socket.sendfile() method allowing a file to be sent over asocket by using high-performance os.sendfile() on UNIX. Patch by GiampaoloRodola’.
- bpo-18039: dbm.dump.open() now always creates a new database when the flaghas the value ‘n’. Patch by Claudiu Popa.
- bpo-21326: Add a new is_closed() method to asyncio.BaseEventLoop.run_forever() and run_until_complete() methods of asyncio.BaseEventLoopnow raise an exception if the event loop was closed.
- bpo-21766: Prevent a security hole in CGIHTTPServer by URL unquoting pathsbefore checking for a CGI script at that path.
- bpo-21310: Fixed possible resource leak in failed open().
- bpo-21256: Printout of keyword args should be in deterministic order in amock function call. This will help to write better doctests.
- bpo-21677: Fixed chaining nonnormalized exceptions in io close() methods.
- bpo-11709: Fix the pydoc.help function to not fail when sys.stdin is not avalid file.
- bpo-21515: tempfile.TemporaryFile now uses os.O_TMPFILE flag is available.
- bpo-13223: Fix pydoc.writedoc so that the HTML documentation for methodsthat use ‘self’ in the example code is generated correctly.
- bpo-21463: In urllib.request, fix pruning of the FTP cache.
- bpo-21618: The subprocess module could fail to close open fds that wereinherited by the calling process and already higher than POSIX resourcelimits would otherwise allow. On systems with a functioning /proc/self/fdor /dev/fd interface the max is now ignored and all fds are closed.
- bpo-20383: Introduce importlib.util.module_from_spec() as the preferredway to create a new module.
- bpo-21552: Fixed possible integer overflow of too long string lengths inthe tkinter module on 64-bit platforms.
- bpo-14315: The zipfile module now ignores extra fields in the centraldirectory that are too short to be parsed instead of letting astruct.unpack error bubble up as this “bad data” appears in many realworld zip files in the wild and is ignored by other zip tools.
- bpo-13742: Added “key” and “reverse” parameters to heapq.merge(). (Firstdraft of patch contributed by Simon Sapin.)
- bpo-21402: tkinter.ttk now works when default root window is not set.
- bpo-3015: _tkinter.create() now creates tkapp object with wantobject=1 bydefault.
- bpo-10203: sqlite3.Row now truly supports sequence protocol. Inparticular it supports reverse() and negative indices. Original patch byClaudiu Popa.
- bpo-18807: If copying (no symlinks) specified for a venv, then the pythoninterpreter aliases (python, python3) are now created by copying ratherthan symlinking.
- bpo-20197: Added support for the WebP image type in the imghdr module.Patch by Fabrice Aneche and Claudiu Popa.
- bpo-21513: Speedup some properties of IP addresses (IPv4Address,IPv6Address) such as .is_private or .is_multicast.
- bpo-21137: Improve the repr for threading.Lock() and its variants byshowing the “locked” or “unlocked” status. Patch by Berker Peksag.
- bpo-21538: The plistlib module now supports loading of binary plist fileswhen reference or offset size is not a power of two.
- bpo-21455: Add a default backlog to socket.listen().
- bpo-21525: Most Tkinter methods which accepted tuples now accept liststoo.
- bpo-22166: With the assistance of a new internal _codecs._forget_codechelping function, test_codecs now clears the encoding caches to avoid theappearance of a reference leak
- bpo-22236: Tkinter tests now don’t reuse default root window. New rootwindow is created for every test class.
- bpo-10744: Fix PEP 3118 format strings on ctypes objects with a nontrivialshape.
- bpo-20826: Optimize ipaddress.collapse_addresses().
- bpo-21487: Optimize ipaddress.summarize_address_range() andipaddress.{IPv4Network,IPv6Network}.subnets().
- bpo-21486: Optimize parsing of netmasks in ipaddress.IPv4Network andipaddress.IPv6Network.
- bpo-13916: Disallowed the surrogatepass error handler for non UTF-*encodings.
- bpo-20998: Fixed re.fullmatch() of repeated single character pattern withignore case. Original patch by Matthew Barnett.
- bpo-21075: fileinput.FileInput now reads bytes from standard stream ifbinary mode is specified. Patch by Sam Kimbrel.
- bpo-19775: Add a samefile() method to pathlib Path objects. Initial patchby Vajrasky Kok.
- bpo-21226: Set up modules properly in PyImport_ExecCodeModuleObject (andfriends).
- bpo-21398: Fix a unicode error in the pydoc pager when the documentationcontains characters not encodable to the stdout encoding.
- bpo-16531: ipaddress.IPv4Network and ipaddress.IPv6Network now accept an(address, netmask) tuple argument, so as to easily construct networkobjects from existing addresses.
- bpo-21156: importlib.abc.InspectLoader.source_to_code() is now astaticmethod.
- bpo-21424: Simplified and optimized heaqp.nlargest() and nmsmallest() tomake fewer tuple comparisons.
- bpo-21396: Fix TextIOWrapper(…, write_through=True) to not force aflush() on the underlying binary stream. Patch by akira.
- bpo-18314: Unlink now removes junctions on Windows. Patch by Kim Gräsman
- bpo-21088: Bugfix for curses.window.addch() regression in 3.4.0. Inporting to Argument Clinic, the first two arguments were reversed.
- bpo-21407: _decimal: The module now supports function signatures.
- bpo-10650: Remove the non-standard ‘watchexp’ parameter from theDecimal.quantize() method in the Python version. It had never beenpresent in the C version.
- bpo-21469: Reduced the risk of false positives in robotparser by checkingto make sure that robots.txt has been read or does not exist prior toreturning True in can_fetch().
- bpo-19414: Have the OrderedDict mark deleted links as unusable. This givesan early failure if the link is deleted during iteration.
- bpo-21421: Add __slots__ to the MappingViews ABC. Patch by Josh Rosenberg.
- bpo-21101: Eliminate double hashing in the C speed-up code forcollections.Counter().
- bpo-21321: itertools.islice() now releases the reference to the sourceiterator when the slice is exhausted. Patch by Anton Afanasyev.
- bpo-21057: TextIOWrapper now allows the underlying binary stream’s read()or read1() method to return an arbitrary bytes-like object (such as amemoryview). Patch by Nikolaus Rath.
- bpo-20951: SSLSocket.send() now raises either SSLWantReadError orSSLWantWriteError on a non-blocking socket if the operation would block.Previously, it would return 0. Patch by Nikolaus Rath.
- bpo-13248: removed previously deprecated asyncore.dispatcher __getattr__cheap inheritance hack.
- bpo-9815: assertRaises now tries to clear references to local variables inthe exception’s traceback.
- bpo-19940: ssl.cert_time_to_seconds() now interprets the given time stringin the UTC timezone (as specified in RFC 5280), not the local timezone.
- bpo-13204: Calling sys.flags.__new__ would crash the interpreter, now itraises a TypeError.
- bpo-19385: Make operations on a closed dbm.dumb database always raise thesame exception.
- bpo-21207: Detect when the os.urandom cached fd has been closed orreplaced, and open it anew.
- bpo-21291: subprocess’s Popen.wait() is now thread safe so that multiplethreads may be calling wait() or poll() on a Popen instance at the sametime without losing the Popen.returncode value.
- bpo-21127: Path objects can now be instantiated from str subclassinstances (such as
numpy.str_). - bpo-15002: urllib.response object to use _TemporaryFileWrapper (and_TemporaryFileCloser) facility. Provides a better way to handle filedescriptor close. Patch contributed by Christian Theune.
- bpo-12220: mindom now raises a custom ValueError indicating it doesn’tsupport spaces in URIs instead of letting a ‘split’ ValueError bubble up.
- bpo-21068: The ssl.PROTOCOL* constants are now enum members.
- bpo-21276: posixmodule: Don’t define USE_XATTRS on KFreeBSD and the Hurd.
- bpo-21262: New method assert_not_called for Mock. It raises AssertionErrorif the mock has been called.
- bpo-21238: New keyword argument
unsafeto Mock. It raisesAttributeErrorincase of an attribute startswith assert or assret. - bpo-20896: ssl.get_server_certificate() now uses PROTOCOL_SSLv23, notPROTOCOL_SSLv3, for maximum compatibility.
- bpo-21239: patch.stopall() didn’t work deterministically when the samename was patched more than once.
- bpo-21203: Updated fileConfig and dictConfig to remove inconsistencies.Thanks to Jure Koren for the patch.
- bpo-21222: Passing name keyword argument to mock.create_autospec nowworks.
- bpo-21197: Add lib64 -> lib symlink in venvs on 64-bit non-OS X POSIX.
- bpo-17498: Some SMTP servers disconnect after certain errors, violatingstrict RFC conformance. Instead of losing the error code when we issuethe subsequent RSET, smtplib now returns the error code and defers raisingthe SMTPServerDisconnected error until the next command is issued.
- bpo-17826: setting an iterable side_effect on a mock function created bycreate_autospec now works. Patch by Kushal Das.
- bpo-7776: Fix
Host:header and reconnection when usinghttp.client.HTTPConnection.set_tunnel(). Patch by Nikolaus Rath. - bpo-20968: unittest.mock.MagicMock now supports division. Patch byJohannes Baiter.
- bpo-21529: Fix arbitrary memory access in JSONDecoder.raw_decode with anegative second parameter. Bug reported by Guido Vranken. (See also:CVE-2014-4616)
- bpo-21169: getpass now handles non-ascii characters that the input streamencoding cannot encode by re-encoding using the replace error handler.
- bpo-21171: Fixed undocumented filter API of the rot13 codec. Patch byBerker Peksag.
- bpo-20539: Improved math.factorial error message for large positive inputsand changed exception type (OverflowError -> ValueError) for largenegative inputs.
- bpo-21172: isinstance check relaxed from dict to collections.Mapping.
- bpo-21155: asyncio.EventLoop.create_unix_server() now raises a ValueErrorif path and sock are specified at the same time.
- bpo-21136: Avoid unnecessary normalization of Fractions resulting frompower and other operations. Patch by Raymond Hettinger.
- bpo-17621: Introduce importlib.util.LazyLoader.
- bpo-21076: signal module constants were turned into enums. Patch byGiampaolo Rodola’.
- bpo-20636: Improved the repr of Tkinter widgets.
- bpo-19505: The items, keys, and values views of OrderedDict now supportreverse iteration using reversed().
- bpo-21149: Improved thread-safety in logging cleanup during interpretershutdown. Thanks to Devin Jeanpierre for the patch.
- bpo-21058: Fix a leak of file descriptor in
tempfile.NamedTemporaryFile(), close the file descriptor ifio.open()fails - bpo-21200: Return None from pkgutil.get_loader() when __spec__ is missing.
- bpo-21013: Enhance ssl.create_default_context() when used for server sidesockets to provide better security by default.
- bpo-20145:
assertRaisesRegexandassertWarnsRegexnow raise aTypeError if the second argument is not a string or compiled regex. - bpo-20633: Replace relative import by absolute import.
- bpo-20980: Stop wrapping exception when using ThreadPool.
- bpo-21082: In os.makedirs, do not set the process-wide umask. Note thischanges behavior of makedirs when exist_ok=True.
- bpo-20990: Fix issues found by pyflakes for multiprocessing.
- bpo-21015: SSL contexts will now automatically select an elliptic curvefor ECDH key exchange on OpenSSL 1.0.2 and later, and otherwise default to“prime256v1”.
- bpo-21000: Improve the command-line interface of json.tool.
- bpo-20995: Enhance default ciphers used by the ssl module to enable bettersecurity and prioritize perfect forward secrecy.
- bpo-20884: Don’t assume that __file__ is defined on importlib.__init__.
- bpo-21499: Ignore __builtins__ in several test_importlib.test_api tests.
- bpo-20627: xmlrpc.client.ServerProxy is now a context manager.
- bpo-19165: The formatter module now raises DeprecationWarning instead ofPendingDeprecationWarning.
- bpo-13936: Remove the ability of datetime.time instances to be consideredfalse in boolean contexts.
- bpo-18931: selectors module now supports /dev/poll on Solaris. Patch byGiampaolo Rodola’.
- bpo-19977: When the
LC_TYPElocale is the POSIX locale (Clocale),sys.stdinandsys.stdoutare now using thesurrogateescapeerror handler, instead of thestricterrorhandler. - bpo-20574: Implement incremental decoder for cp65001 code (Windows codepage 65001, Microsoft UTF-8).
- bpo-20879: Delay the initialization of encoding and decoding tables forbase32, ascii85 and base85 codecs in the base64 module, and delay theinitialization of the unquote_to_bytes() table of the urllib.parse module,to not waste memory if these modules are not used.
- bpo-19157: Include the broadcast address in the usuable hosts for IPv6 inipaddress.
- bpo-11599: When an external command (e.g. compiler) fails, distutils nowprints out the whole command line (instead of just the command name) ifthe environment variable DISTUTILS_DEBUG is set.
- bpo-4931: distutils should not produce unhelpful “error: None” messagesanymore. distutils.util.grok_environment_error is kept but doc-deprecated.
- bpo-20875: Prevent possible gzip “‘read’ is not defined” NameError. Patchby Claudiu Popa.
- bpo-11558:
email.message.Message.attachnow returns a more usefulerror message ifattachis called on a message for whichis_multipartis False. - bpo-20283: RE pattern methods now accept the string keyword parameters asdocumented. The pattern and source keyword parameters are left asdeprecated aliases.
- bpo-20778: Fix modulefinder to work with bytecode-only modules.
- bpo-20791: copy.copy() now doesn’t make a copy when the input is a bytesobject. Initial patch by Peter Otten.
- bpo-19748: On AIX, time.mktime() now raises an OverflowError for yearoutsize range [1902; 2037].
- bpo-19573: inspect.signature: Use enum for parameter kind constants.
- bpo-20726: inspect.signature: Make Signature and Parameter picklable.
- bpo-17373: Add inspect.Signature.from_callable method.
- bpo-20378: Improve repr of inspect.Signature and inspect.Parameter.
- bpo-20816: Fix inspect.getcallargs() to raise correct TypeError formissing keyword- only arguments. Patch by Jeremiah Lowin.
- bpo-20817: Fix inspect.getcallargs() to fail correctly if more than 3arguments are missing. Patch by Jeremiah Lowin.
- bpo-6676: Ensure a meaningful exception is raised when attempting to parsemore than one XML document per pyexpat xmlparser instance. (Originalpatches by Hirokazu Yamamoto and Amaury Forgeot d’Arc, with suggestedwording by David Gutteridge)
- bpo-21117: Fix inspect.signature to better support functools.partial. Dueto the specifics of functools.partial implementation,positional-or-keyword arguments passed as keyword arguments becomekeyword-only.
- bpo-20334: inspect.Signature and inspect.Parameter are now hashable.Thanks to Antony Lee for bug reports and suggestions.
- bpo-15916: doctest.DocTestSuite returns an empty unittest.TestSuiteinstead of raising ValueError if it finds no tests
- bpo-21209: Fix asyncio.tasks.CoroWrapper to workaround a bug in yield-fromimplementation in CPythons prior to 3.4.1.
- asyncio: Add gi_{frame,running,code} properties to CoroWrapper (upstreambpo-163).
- bpo-21311: Avoid exception in _osx_support with non-standard compilerconfigurations. Patch by John Szakmeister.
- bpo-11571: Ensure that the turtle window becomes the topmost window whenlaunched on OS X.
- bpo-21801: Validate that __signature__ is None or an instance ofSignature.
- bpo-21923: Prevent AttributeError indistutils.sysconfig.customize_compiler due to possible uninitialized_config_vars.
- bpo-21323: Fix http.server to again handle scripts in CGI subdirectories,broken by the fix for securitybpo-19435. Patch by Zach Byrne.
- bpo-22733: Fix ffi_prep_args not zero-extending argument values correctlyon 64-bit Windows.
- bpo-23302: Default to TCP_NODELAY=1 upon establishing an HTTPConnection.Removed use of hard-coded MSS as it’s an optimization that’s no longerneeded with Nagle disabled.
IDLE¶
- bpo-20577: Configuration of the max line length for the FormatParagraphextension has been moved from the General tab of the Idle preferencesdialog to the FormatParagraph tab of the Config Extensions dialog. Patchby Tal Einat.
- bpo-16893: Update Idle doc chapter to match current Idle and add newinformation.
- bpo-3068: Add Idle extension configuration dialog to Options menu. Changesare written to HOME/.idlerc/config-extensions.cfg. Original patch by TalEinat.
- bpo-16233: A module browser (File : Class Browser, Alt+C) requires aneditor window with a filename. When Class Browser is requested otherwise,from a shell, output window, or ‘Untitled’ editor, Idle no longer displaysan error box. It now pops up an Open Module box (Alt+M). If a valid nameis entered and a module is opened, a corresponding browser is also opened.
- bpo-4832: Save As to type Python files automatically adds .py to the nameyou enter (even if your system does not display it). Some systemsautomatically add .txt when type is Text files.
- bpo-21986: Code objects are not normally pickled by the pickle module. Tomatch this, they are no longer pickled when running under Idle.
- bpo-17390: Adjust Editor window title; remove ‘Python’, move version toend.
- bpo-14105: Idle debugger breakpoints no longer disappear when inserting ordeleting lines.
- bpo-17172: Turtledemo can now be run from Idle. Currently, the entry is onthe Help menu, but it may move to Run. Patch by Ramchandra Apt and LitaCho.
- bpo-21765: Add support for non-ascii identifiers to HyperParser.
- bpo-21940: Add unittest for WidgetRedirector. Initial patch by SaimadhavHeblikar.
- bpo-18592: Add unittest for SearchDialogBase. Patch by Phil Webster.
- bpo-21694: Add unittest for ParenMatch. Patch by Saimadhav Heblikar.
- bpo-21686: add unittest for HyperParser. Original patch by SaimadhavHeblikar.
- bpo-12387: Add missing upper(lower)case versions of default Windows keybindings for Idle so Caps Lock does not disable them. Patch by RogerSerwy.
- bpo-21695: Closing a Find-in-files output window while the search is stillin progress no longer closes Idle.
- bpo-18910: Add unittest for textView. Patch by Phil Webster.
- bpo-18292: Add unittest for AutoExpand. Patch by Saihadhav Heblikar.
- bpo-18409: Add unittest for AutoComplete. Patch by Phil Webster.
- bpo-21477: htest.py - Improve framework, complete set of tests. Patches bySaimadhav Heblikar
- bpo-18104: Add idlelib/idle_test/htest.py with a few sample tests to beginconsolidating and improving human-validated tests of Idle. Change otherfiles as needed to work with htest. Running the module as __main__ runsall tests.
- bpo-21139: Change default paragraph width to 72, the PEP 8 recommendation.
- bpo-21284: Paragraph reformat test passes after user changes reformatwidth.
- bpo-17654: Ensure IDLE menus are customized properly on OS X fornon-framework builds and for all variants of Tk.
- bpo-23180: Rename IDLE “Windows” menu item to “Window”. Patch by AlSweigart.
Build¶
- bpo-15506: Use standard PKG_PROG_PKG_CONFIG autoconf macro in theconfigure script.
- bpo-22935: Allow the ssl module to be compiled if openssl doesn’t supportSSL 3.
- bpo-22592: Drop support of the Borland C compiler to build Python. Thedistutils module still supports it to build extensions.
- bpo-22591: Drop support of MS-DOS, especially of the DJGPP compiler(MS-DOS port of GCC).
- bpo-16537: Check whether self.extensions is empty in setup.py. Patch byJonathan Hosmer.
- bpo-22359: Remove incorrect uses of recursive make. Patch by JonasWagner.
- bpo-21958: Define HAVE_ROUND when building with Visual Studio 2013 andabove. Patch by Zachary Turner.
- bpo-18093: the programs that embed the CPython runtime are now in aseparate “Programs” directory, rather than being kept in the Modulesdirectory.
- bpo-15759: “make suspicious”, “make linkcheck” and “make doctest” in Doc/now display special message when and only when there are failures.
- bpo-21141: The Windows build process no longer attempts to find Perl,instead relying on OpenSSL source being configured and ready to build.The
PCbuild\build_ssl.pyscript has been re-written and re-named toPCbuild\prepare_ssl.py, and takes care of configuring OpenSSL sourcefor both 32 and 64 bit platforms. OpenSSL sources obtained fromsvn.python.org will always be pre-configured and ready to build. - bpo-21037: Add a build option to enable AddressSanitizer support.
- bpo-19962: The Windows build process now creates “python.bat” in the rootof the source tree, which passes all arguments through to the mostrecently built interpreter.
- bpo-21285: Refactor and fix curses configure check to always search in ancursesw directory.
- bpo-15234: For BerkelyDB and Sqlite, only add the found library andinclude directories if they aren’t already being searched. This avoids anexplicit runtime library dependency.
- bpo-17861: Tools/scripts/generate_opcode_h.py automatically regeneratesInclude/opcode.h from Lib/opcode.py if the latter gets any change.
- bpo-20644: OS X installer build support for documentation build changes in3.4.1: assume externally supplied sphinx-build is available in /usr/bin.
- bpo-20022: Eliminate use of deprecated bundlebuilder in OS X builds.
- bpo-15968: Incorporated Tcl, Tk, and Tix builds into the Windows buildsolution.
- bpo-17095: Fix Modules/Setupshared support.
- bpo-21811: Anticipated fixes to support OS X versions > 10.9.
- bpo-21166: Prevent possible segfaults and other random failures of python–generate- posix-vars in pybuilddir.txt build target.
- bpo-18096: Fix library order returned by python-config.
- bpo-17219: Add library build dir for Python extension cross-builds.
- bpo-22919: Windows build updated to support VC 14.0 (Visual Studio 2015),which will be used for the official release.
- bpo-21236: Build _msi.pyd with cabinet.lib instead of fci.lib
- bpo-17128: Use private version of OpenSSL for OS X 10.5+ installer.
C API¶
- bpo-14203: Remove obsolete support for view==NULL in PyBuffer_FillInfo(),bytearray_getbuffer(), bytesiobuf_getbuffer() and array_buffer_getbuf().All functions now raise BufferError in that case.
- bpo-22445: PyBuffer_IsContiguous() now implements precise contiguitytests, compatible with NumPy’s NPY_RELAXED_STRIDES_CHECKING compilationflag. Previously the function reported false negatives for corner cases.
- bpo-22079: PyType_Ready() now checks that statically allocated type has nodynamically allocated bases.
- bpo-22453: Removed non-documented macro PyObject_REPR().
- bpo-18395: Rename
_Py_char2wchar()toPy_DecodeLocale(),rename_Py_wchar2char()toPy_EncodeLocale(), and documentthese functions. - bpo-21233: Add new C functions: PyMem_RawCalloc(), PyMem_Calloc(),PyObject_Calloc(), _PyObject_GC_Calloc(). bytes(int) is now using
calloc()instead ofmalloc()for large objects which is faster anduse less memory. - bpo-20942: PyImport_ImportFrozenModuleObject() no longer sets __file__ tomatch what importlib does; this affects _frozen_importlib as well as anymodule loaded using imp.init_frozen().
Documentation¶
- bpo-19548: Update the codecs module documentation to better cover thedistinction between text encodings and other codecs, together with otherclarifications. Patch by Martin Panter.
- bpo-22394: Doc/Makefile now supports
makevenvPYTHON=../pythontocreate a venv for generating the documentation, e.g.,makehtmlPYTHON=venv/bin/python3. - bpo-21514: The documentation of the json module now refers to new JSON RFC7159 instead of obsoleted RFC 4627.
- bpo-21777: The binary sequence methods on bytes and bytearray are nowdocumented explicitly, rather than assuming users will be able to derivethe expected behaviour from the behaviour of the corresponding strmethods.
- bpo-6916: undocument deprecated asynchat.fifo class.
- bpo-17386: Expanded functionality of the
Doc/make.batscript to makeit much more comparable toDoc/Makefile. - bpo-21312: Update the thread_foobar.h template file to include newerthreading APIs. Patch by Jack McCracken.
- bpo-21043: Remove the recommendation for specific CA organizations and tomention the ability to load the OS certificates.
- bpo-20765: Add missing documentation for PurePath.with_name() andPurePath.with_suffix().
- bpo-19407: New package installation and distribution guides based on thePython Packaging Authority tools. Existing guides have been retained aslegacy links from the distutils docs, as they still contain some requiredreference material for tool developers that isn’t recorded anywhere else.
- bpo-19697: Document cases where __main__.__spec__ is None.
Tests¶
- bpo-18982: Add tests for CLI of the calendar module.
- bpo-19548: Added some additional checks to test_codecs to ensure thatstatements in the updated documentation remain accurate. Patch by MartinPanter.
- bpo-22838: All test_re tests now work with unittest test discovery.
- bpo-22173: Update lib2to3 tests to use unittest test discovery.
- bpo-16000: Convert test_curses to use unittest.
- bpo-21456: Skip two tests in test_urllib2net.py if _ssl module notpresent. Patch by Remi Pointel.
- bpo-20746: Fix test_pdb to run in refleak mode (-R). Patch by Xavier deGaye.
- bpo-22060: test_ctypes has been somewhat cleaned up and simplified; it nowuses unittest test discovery to find its tests.
- bpo-22104: regrtest.py no longer holds a reference to the suite of testsloaded from test modules that don’t define test_main().
- bpo-22111: Assorted cleanups in test_imaplib. Patch by Milan Oberkirch.
- bpo-22002: Added
load_package_testsfunction to test.support and usedit to implement/augment test discovery in test_asyncio, test_email,test_importlib, test_json, and test_tools. - bpo-21976: Fix test_ssl to accept LibreSSL version strings. Thanks toWilliam Orr.
- bpo-21918: Converted test_tools from a module to a package containingseparate test files for each tested script.
- bpo-9554: Use modern unittest features in test_argparse. Initial patch byDenver Coneybeare and Radu Voicilas.
- bpo-20155: Changed HTTP method names in failing tests in test_httpserversso that packet filtering software (specifically Windows Base FilteringEngine) does not interfere with the transaction semantics expected by thetests.
- bpo-19493: Refactored the ctypes test package to skip tests explicitlyrather than silently.
- bpo-18492: All resources are now allowed when tests are not run byregrtest.py.
- bpo-21634: Fix pystone micro-benchmark: use floor division instead of truedivision to benchmark integers instead of floating point numbers. Setpystone version to 1.2. Patch written by Lennart Regebro.
- bpo-21605: Added tests for Tkinter images.
- bpo-21493: Added test for ntpath.expanduser(). Original patch by ClaudiuPopa.
- bpo-19925: Added tests for the spwd module. Original patch by VajraskyKok.
- bpo-21522: Added Tkinter tests for Listbox.itemconfigure(),PanedWindow.paneconfigure(), and Menu.entryconfigure().
- bpo-17756: Fix test_code test when run from the installed location.
- bpo-17752: Fix distutils tests when run from the installed location.
- bpo-18604: Consolidated checks for GUI availability. All platforms now atleast check whether Tk can be instantiated when the GUI resource isrequested.
- bpo-21275: Fix a socket test on KFreeBSD.
- bpo-21223: Pass test_site/test_startup_imports when some of the extensionsare built as builtins.
- bpo-20635: Added tests for Tk geometry managers.
- Add test case for freeze.
- bpo-20743: Fix a reference leak in test_tcl.
- bpo-21097: Move test_namespace_pkgs into test_importlib.
- bpo-21503: Use test_both() consistently in test_importlib.
- bpo-20939: Avoid various network test failures due to new redirect ofhttp://www.python.org/ tohttps://www.python.org: usehttp://www.example.com instead.
- bpo-20668: asyncio tests no longer rely on tests.txt file. (Patch byVajrasky Kok)
- bpo-21093: Prevent failures of ctypes test_macholib on OS X if a copy oflibz exists in $HOME/lib or /usr/local/lib.
- bpo-22770: Prevent some Tk segfaults on OS X when running gui tests.
- bpo-23211: Workaround test_logging failure on some OS X 10.6 systems.
- bpo-23345: Prevent test_ssl failures with large OpenSSL patch level values(like 0.9.8zc).
Tools/Demos¶
- bpo-22314: pydoc now works when the LINES environment variable is set.
- bpo-22615: Argument Clinic now supports the “type” argument for the intconverter. This permits using the int converter with enums and typedefs.
- bpo-20076: The makelocalealias.py script no longer ignores UTF-8 mapping.
- bpo-20079: The makelocalealias.py script now can parse the SUPPORTED filefrom glibc sources and supports command line options for source paths.
- bpo-22201: Command-line interface of the zipfile module now correctlyextracts ZIP files with directory entries. Patch by Ryan Wilson.
- bpo-22120: For functions using an unsigned integer return converter,Argument Clinic now generates a cast to that type for the comparison to -1in the generated code. (This suppresses a compilation warning.)
- bpo-18974: Tools/scripts/diff.py now uses argparse instead of optparse.
- bpo-21906: Make Tools/scripts/md5sum.py work in Python 3. Patch by ZacharyWare.
- bpo-21629: Fix Argument Clinic’s “–converters” feature.
- Add support for
yieldfromto 2to3. - Add support for the PEP 465 matrix multiplication operator to 2to3.
- bpo-16047: Fix module exception list and __file__ handling in freeze.Patch by Meador Inge.
- bpo-11824: Consider ABI tags in freeze. Patch by Meador Inge.
- bpo-20535: PYTHONWARNING no longer affects the run_tests.py script. Patchby Arfrever Frehtes Taifersar Arahesis.
Windows¶
- bpo-23260: Update Windows installer
- The bundled version of Tcl/Tk has been updated to 8.6.3. The most visibleresult of this change is the addition of new native file dialogs whenrunning on Windows Vista or newer. See Tcl/Tk’s TIP 432 for moreinformation. Also, this version of Tcl/Tk includes support for Windows10.
- bpo-17896: The Windows build scripts now expect external library sourcesto be in
PCbuild\..\externalsrather thanPCbuild\..\... - bpo-17717: The Windows build scripts now use a copy of NASM pulled fromsvn.python.org to build OpenSSL.
- bpo-21907: Improved the batch scripts provided for building Python.
- bpo-22644: The bundled version of OpenSSL has been updated to 1.0.1j.
- bpo-10747: Use versioned labels in the Windows start menu. Patch by OliveKilburn.
- bpo-22980: .pyd files with a version and platform tag (for example,“.cp35-win32.pyd”) will now be loaded in preference to those without tags.
Python 3.4.0 final¶
Release date: 2014-03-16
Library¶
- bpo-20939: Fix test_geturl failure in test_urllibnet due to new redirectofhttp://www.python.org/ tohttps://www.python.org.
Documentation¶
- Merge in all documentation changes since branching 3.4.0rc1.
Python 3.4.0 release candidate 3¶
Release date: 2014-03-09
Library¶
- bpo-20839: Don’t trigger a DeprecationWarning in the still supportedpkgutil.get_loader() API when __loader__ isn’t set on a module (nor whenpkgutil.find_loader() is called directly).
Build¶
- bpo-14512: Launch pydoc -b instead of pydocgui.pyw on Windows.
- bpo-20748: Uninstalling pip does not leave behind the pyc of theuninstaller anymore.
- bpo-20568: The Windows installer now installs the unversioned
pipcommand in addition to the versionedpip3andpip3.4commands. - bpo-20757: The ensurepip helper for the Windows uninstaller now skipsuninstalling pip (rather than failing) if the user has updated pip to adifferent version from the one bundled with ensurepip.
- bpo-20465: Update OS X and Windows installer builds to use SQLite 3.8.3.1.
Python 3.4.0 release candidate 2¶
Release date: 2014-02-23
Core and Builtins¶
- bpo-20625: Parameter names in __annotations__ were not mangled properly.Discovered by Jonas Wielicki, patch by Yury Selivanov.
- bpo-20261: In pickle, lookup __getnewargs__ and __getnewargs_ex__ on thetype of the object.
- bpo-20619: Give the AST nodes of keyword-only arguments a column and linenumber.
- bpo-20526: Revert changes ofbpo-19466 which introduces a regression:don’t clear anymore the state of Python threads early during the Pythonshutdown.
Library¶
- bpo-20710: The pydoc summary line no longer displays the “self” parameterfor bound methods.
- bpo-20566: Change asyncio.as_completed() to use a Queue, to avoid O(N**2)behavior.
- bpo-20704: Implement new debug API in asyncio. Add new methodsBaseEventLoop.set_debug() and BaseEventLoop.get_debug(). Add support forsetting ‘asyncio.tasks._DEBUG’ variable with ‘PYTHONASYNCIODEBUG’environment variable.
- asyncio: Refactoring and fixes: BaseEventLoop.sock_connect() raises anerror if the address is not resolved; use __slots__ in Handle andTimerHandle; as_completed() and wait() raise TypeError if the passed listof Futures is a single Future; call_soon() and other ‘call_*()’ functionsraise TypeError if the passed callback is a coroutine function;_ProactorBasePipeTransport uses _FlowControlMixin;WriteTransport.set_write_buffer_size() calls _maybe_pause_protocol() toconsider pausing receiving if the watermark limits have changed; fix_check_resolved_address() for IPv6 address; and other minor improvements,along with multiple documentation updates.
- bpo-20684: Fix inspect.getfullargspec() to not to follow __wrapped__chains. Make its behaviour consistent with bound methods first argument.Patch by Nick Coghlan and Yury Selivanov.
- bpo-20681: Add new error handling API in asyncio. New APIs:loop.set_exception_handler(), loop.default_exception_handler(), andloop.call_exception_handler().
- bpo-20673: Implement support for UNIX Domain Sockets in asyncio. New APIs:loop.create_unix_connection(), loop.create_unix_server(),streams.open_unix_connection(), and streams.start_unix_server().
- bpo-20616: Add a format() method to tracemalloc.Traceback.
- bpo-19744: the ensurepip installation step now just prints a warning tostderr rather than failing outright if SSL/TLS is unavailable. This allowslocal installation of POSIX builds without SSL/TLS support.
- bpo-20594: Avoid name clash with the libc function posix_close.
Build¶
- bpo-20641: Run MSI custom actions (pip installation, pyc compilation) withthe NoImpersonate flag, to support elevated execution (UAC).
- bpo-20221: Removed conflicting (or circular) hypot definition whencompiled with VS 2010 or above. Initial patch by Tabrez Mohammed.
- bpo-20609: Restored the ability to build 64-bit Windows binaries on 32-bitWindows, which was broken by the change inbpo-19788.
Python 3.4.0 release candidate 1¶
Release date: 2014-02-10
Core and Builtins¶
- bpo-19255: The builtins module is restored to initial value beforecleaning other modules. The sys and builtins modules are cleaned last.
- bpo-20588: Make Python-ast.c C89 compliant.
- bpo-20437: Fixed 22 potential bugs when deleting object references.
- bpo-20500: Displaying an exception at interpreter shutdown no longer riskstriggering an assertion failure in PyObject_Str.
- bpo-20538: UTF-7 incremental decoder produced inconsistent string wheninput was truncated in BASE64 section.
- bpo-20404: io.TextIOWrapper (and hence the open() builtin) now uses theinternal codec marking system added forbpo-19619 to throw LookupErrorfor known non- text encodings at stream construction time. The existingoutput type checks remain in place to deal with unmarked third partycodecs.
- bpo-17162: Add PyType_GetSlot.
- bpo-20162: Fix an alignment issue in the siphash24() hash function whichcaused a crash on PowerPC 64-bit (ppc64).
Library¶
- bpo-20530: The signatures for slot builtins have been updated to reflectthe fact that they only accept positional-only arguments.
- bpo-20517: Functions in the os module that accept two filenames nowregister both filenames in the exception on failure.
- bpo-20563: The ipaddress module API is now considered stable.
- bpo-14983: email.generator now always adds a line end after each MIMEboundary marker, instead of doing so only when there is an epilogue. Thisfixes an RFC compliance bug and solves an issue with signed MIME parts.
- bpo-20540: Fix a performance regression (vs. Python 3.2) when layering amultiprocessing Connection over a TCP socket. For small payloads, Nagle’salgorithm would introduce idle delays before the entire transmission of amessage.
- bpo-16983: the new email header parsing code will now decode encoded wordsthat are (incorrectly) surrounded by quotes, and register a defect.
- bpo-19772: email.generator no longer mutates the message object when doinga down- transform from 8bit to 7bit CTEs.
- bpo-20536: the statistics module now correctly handle Decimal instanceswith positive exponents
- bpo-18805: the netmask/hostmask parsing in ipaddress now more reliablyfilters out illegal values and correctly allows any valid prefix length.
- bpo-20481: For at least Python 3.4, the statistics module will requirethat all inputs for a single operation be of a single consistent type, orelse a mixed of ints and a single other consistent type. This avoids someinteroperability issues that arose with the previous approach of coercingto a suitable common type.
- bpo-20478: the statistics module now treats collections.Counter inputslike any other iterable.
- bpo-17369: get_filename was raising an exception if the filenameparameter’s RFC2231 encoding was broken in certain ways. This was aregression relative to python2.
- bpo-20013: Some imap servers disconnect if the current mailbox is deleted,and imaplib did not handle that case gracefully. Now it handles the ‘bye’correctly.
- bpo-20531: Revert 3.4 version of fix for #19063, and apply the 3.3version. That is, donot raise an error if unicode is passed toemail.message.Message.set_payload.
- bpo-20476: If a non-compat32 policy is used with any of the email parsers,EmailMessage is now used as the factory class. The factory class shouldreally come from the policy; that will get fixed in 3.5.
- bpo-19920: TarFile.list() no longer fails when outputs a listingcontaining non- encodable characters. Based on patch by Vajrasky Kok.
- bpo-20515: Fix NULL pointer dereference introduced bybpo-20368.
- bpo-19186: Restore namespacing of expat symbols inside the pyexpat module.
- bpo-20053: ensurepip (and hence venv) are no longer affected by thesettings in the default pip configuration file.
- bpo-20426: When passing the re.DEBUG flag, re.compile() displays the debugoutput every time it is called, regardless of the compilation cache.
- bpo-20368: The null character now correctly passed from Tcl to Python.Improved error handling in variables-related commands.
- bpo-20435: Fix _pyio.StringIO.getvalue() to take into account newlinetranslation settings.
- tracemalloc: Fix slicing traces and fix slicing a traceback.
- bpo-20354: Fix an alignment issue in the tracemalloc module on 64-bitplatforms. Bug seen on 64-bit Linux when using “make profile-opt”.
- bpo-17159: inspect.signature now accepts duck types of functions, whichadds support for Cython functions. Initial patch by Stefan Behnel.
- bpo-18801: Fix inspect.classify_class_attrs to correctly classifyobject.__new__ and object.__init__.
- Fixed cmath.isinf’s name in its argument parsing code.
- bpo-20311: poll and epoll now round the timeout away from zero, instead ofrounding towards zero, in select and selectors modules:select.epoll.poll(), selectors.PollSelector.poll() andselectors.EpollSelector.poll(). For example, a timeout of one microsecond(1e-6) is now rounded to one millisecondi (1e-3), instead of being roundedto zero. However, the granularity property and asyncio’s resolutionfeature were removed again. (See also:bpo-20452)
- asyncio: Some refactoring; various fixes; add write flow control to unixpipes; Future.set_exception() instantiates the exception argument if it isa class; improved proactor pipe transport; support wait_for(f, None);don’t log broken/disconnected pipes; use ValueError instead of assert forforbidden subprocess_{shell,exec} arguments; added a convenience API forsubprocess management; added StreamReader.at_eof(); properly handleduplicate coroutines/futures in gather(), wait(), as_completed(); use abytearray for buffering in StreamReader; and more.
- bpo-20288: fix handling of invalid numeric charrefs in HTMLParser.
- bpo-20424: Python implementation of io.StringIO now supports lonesurrogates.
- bpo-20308: inspect.signature now works on classes without user-defined__init__ or __new__ methods.
- bpo-20372: inspect.getfile (and a bunch of other inspect functions thatuse it) doesn’t crash with unexpected AttributeError on classes defined inC without __module__.
- bpo-20356: inspect.signature formatting uses ‘/’ to separatepositional-only parameters from others.
- bpo-20223: inspect.signature now supports methods defined withfunctools.partialmethods.
- bpo-19456: ntpath.join() now joins relative paths correctly when a driveis present.
- bpo-19077: tempfile.TemporaryDirectory cleanup no longer fails when calledduring shutdown. Emitting resource warning in __del__ no longer fails.Original patch by Antoine Pitrou.
- bpo-20394: Silence Coverity warning in audioop module.
- bpo-20367: Fix behavior of concurrent.futures.as_completed() for duplicatearguments. Patch by Glenn Langford.
- bpo-8260: The read(), readline() and readlines() methods ofcodecs.StreamReader returned incomplete data when were called afterreadline() or read(size). Based on patch by Amaury Forgeot d’Arc.
- bpo-20105: the codec exception chaining now correctly sets the tracebackof the original exception as its __traceback__ attribute.
- bpo-17481: inspect.getfullargspec() now uses inspect.signature() API.
- bpo-15304: concurrent.futures.wait() can block forever even if Futureshave completed. Patch by Glenn Langford.
- bpo-14455: plistlib: fix serializing integers in the range of an unsignedlong long but outside of the range of signed long long for binary plistfiles.
IDLE¶
- bpo-20406: Use Python application icons for Idle window title bars. Patchmostly by Serhiy Storchaka.
- Update the python.gif icon for the Idle classbrowser and pathbowser fromthe old green snake to the new blue and yellow snakes.
- bpo-17721: Remove non-functional configuration dialog help button until wemake it actually gives some help when clicked. Patch by Guilherme Simões.
Tests¶
Tools/Demos¶
- bpo-20530: Argument Clinic’s signature format has been revised again. Thenew syntax is highly human readable while still preventing falsepositives. The syntax also extends Python syntax to denote “self” andpositional-only parameters, allowing inspect.Signature objects to betotally accurate for all supported builtins in Python 3.4.
- bpo-20456: Argument Clinic now observes the C preprocessor conditionalcompilation statements of the C files it parses. When a Clinic block isinside a conditional code, it adjusts its output to match, includingautomatically generating an empty methoddef macro.
- bpo-20456: Cloned functions in Argument Clinic now use the correct name,not the name of the function they were cloned from, for text stringsinside generated code.
- bpo-20456: Fixed Argument Clinic’s test suite and “–converters” feature.
- bpo-20456: Argument Clinic now allows specifying different names for aparameter in Python and C, using “as” on the parameter line.
- bpo-20326: Argument Clinic now uses a simple, unique signature to annotatetext signatures in docstrings, resulting in fewer false positives. “self”parameters are also explicitly marked, allowing inspect.Signature() toauthoritatively detect (and skip) said parameters.
- bpo-20326: Argument Clinic now generates separate checksums for the inputand output sections of the block, allowing external tools to verify thatthe input has not changed (and thus the output is not out-of-date).
Python 3.4.0 beta 3¶
Release date: 2014-01-26
Core and Builtins¶
- bpo-20189: Four additional builtin types (PyTypeObject,PyMethodDescr_Type, _PyMethodWrapper_Type, and PyWrapperDescr_Type) havebeen modified to provide introspection information for builtins.
- bpo-17825: Cursor “^” is correctly positioned for SyntaxError andIndentationError.
- bpo-2382: SyntaxError cursor “^” is now written at correct position inmost cases when multibyte characters are in line (before “^”). This stillnot works correctly with wide East Asian characters.
- bpo-18960: The first line of Python script could be executed twice whenthe source encoding was specified on the second line. Now the sourceencoding declaration on the second line isn’t effective if the first linecontains anything except a comment. ‘python -x’ works now again withfiles with the source encoding declarations, and can be used to makePython batch files on Windows.
Library¶
- asyncio: Various improvements and small changes not all covered by issueslisted below. E.g. wait_for() now cancels the inner task if the timeoutocccurs; tweaked the set of exported symbols; renamed Empty/Full toQueueEmpty/QueueFull; “with (yield from lock)” now uses a separate contextmanager; readexactly() raises if not enough data was read; PTY supporttweaks.
- bpo-20311: asyncio: Add a granularity attribute to BaseEventLoop: maximumbetween the resolution of the BaseEventLoop.time() method and theresolution of the selector. The granuarility is used in the scheduler toround time and deadline.
- bpo-20311: selectors: Add a resolution attribute to BaseSelector.
- bpo-20189: unittest.mock now no longer assumes that any object for whichit could get an inspect.Signature is a callable written in Python. Fixcourtesy of Michael Foord.
- bpo-20317: ExitStack.__exit__ could create a self-referential loop if anexception raised by a cleanup operation already had its context setcorrectly (for example, by the @contextmanager decorator). The infiniteloop this caused is now avoided by checking if the expected context isalready set before trying to fix it.
- bpo-20374: Fix build with GNU readline >= 6.3.
- bpo-20262: Warnings are raised now when duplicate names are added in theZIP file or too long ZIP file comment is truncated.
- bpo-20165: The unittest module no longer considers tests marked with@expectedFailure successful if they pass.
- bpo-18574: Added missing newline in 100-Continue reply fromhttp.server.BaseHTTPRequestHandler. Patch by Nikolaus Rath.
- bpo-20270: urllib.urlparse now supports empty ports.
- bpo-20243: TarFile no longer raise ReadError when opened in write mode.
- bpo-20238: TarFile opened with external fileobj and “w:gz” mode didn’twrite complete output on close.
- bpo-20245: The open functions in the tarfile module now correctly handleempty mode.
- bpo-20242: Fixed basicConfig() format strings for the alternativeformatting styles. Thanks to kespindler for the bug report and patch.
- bpo-20246: Fix buffer overflow in socket.recvfrom_into.
- bpo-20206: Fix edge case in email.quoprimime.encode where it truncatedlines ending in a character needing encoding but no newline by using amore efficient algorithm that doesn’t have the bug. (See also:bpo-5803)
- bpo-19082: Working xmlrpc.server and xmlrpc.client examples. Both inmodules and in documentation. Initial patch contributed by Vajrasky Kok.
- bpo-20138: The wsgiref.application_uri() and wsgiref.request_uri()functions now conform to PEP 3333 when handle non-ASCII URLs.
- bpo-19097: Raise the correct Exception when cgi.FieldStorage is given aninvalid fileobj.
- bpo-20152: Ported Python/import.c over to Argument Clinic.
- bpo-13107: argparse and optparse no longer raises an exception when outputa help on environment with too small COLUMNS. Based on patch by ElazarGershuni.
- bpo-20207: Always disable SSLv2 except when PROTOCOL_SSLv2 is explicitlyasked for.
- bpo-18960: The tokenize module now ignore the source encoding declarationon the second line if the first line contains anything except a comment.
- bpo-20078: Reading malformed zipfiles no longer hangs with 100% CPUconsumption.
- bpo-20113: os.readv() and os.writev() now raise an OSError exception onerror instead of returning -1.
- bpo-19719: Make importlib.abc.MetaPathFinder.find_module(),PathEntryFinder.find_loader(), and Loader.load_module() use PEP 451 APIsto help with backwards-compatibility.
- bpo-20144: inspect.Signature now supports parsing simple symbolicconstants as parameter default values in __text_signature__.
- bpo-20072: Fixed multiple errors in tkinter with wantobjects is False.
- bpo-20229: Avoid plistlib deprecation warning in platform.mac_ver().
- bpo-14455: Fix some problems with the new binary plist support inplistlib.
IDLE¶
Tests¶
Tools/Demos¶
- bpo-20390: Argument Clinic’s “file” output preset now defaults to“{dirname}/clinic/{basename}.h”.
- bpo-20390: Argument Clinic’s “class” directive syntax has been extendedwith two new required arguments: “typedef” and “type_object”.
- bpo-20390: Argument Clinic: If __new__ or __init__ functions didn’t usekwargs (or args), the PyArg_NoKeywords (or PyArg_NoPositional) callsgenerated are only run when the type object is an exact match.
- bpo-20390: Argument Clinic now fails if you have required parameters afteroptional parameters.
- bpo-20390: Argument Clinic converters now have a new template they caninject code into: “modifiers”. Code put there is run in the parsingfunction after argument parsing but before the call to the impl.
- bpo-20376: Argument Clinic now escapes backslashes in docstrings.
- bpo-20381: Argument Clinic now sanity checks the default argument whenc_default is also specified, providing a nice failure message fordisallowed values.
- bpo-20189: Argument Clinic now ensures that parser functions for __new__are always of type newfunc, the type of the tp_new slot. Similarly, parserfunctions for __init__ are now always of type initproc, the type oftp_init.
- bpo-20189: Argument Clinic now suppresses the docstring for __new__ and__init__ functions if no docstring is provided in the input.
- bpo-20189: Argument Clinic now suppresses the “self” parameter in the implfor @staticmethod functions.
- bpo-20294: Argument Clinic now supports argument parsing for __new__ and__init__ functions.
- bpo-20299: Argument Clinic custom converters may now change the defaultvalue of c_default and py_default with a class member.
- bpo-20287: Argument Clinic’s output is now configurable, allowing delayingits output or even redirecting it to a separate file.
- bpo-20226: Argument Clinic now permits simple expressions (e.g.“sys.maxsize - 1”) as default values for parameters.
- bpo-19936: Added executable bits or shebang lines to Python scripts whichrequires them. Disable executable bits and shebang lines in test andbenchmark files in order to prevent using a random system python, and insource files of modules which don’t provide command line interface. Fixedshebang lines in the unittestgui and checkpip scripts.
- bpo-20268: Argument Clinic now supports cloning the parameters and returnconverter of existing functions.
- bpo-20228: Argument Clinic now has special support for class specialmethods.
- bpo-20214: Fixed a number of small issues and documentation errors inArgument Clinic (see issue for details).
- bpo-20196: Fixed a bug where Argument Clinic did not generate correctparsing code for functions with positional-only parameters where allarguments are optional.
- bpo-18960: 2to3 and the findnocoding.py script now ignore the sourceencoding declaration on the second line if the first line containsanything except a comment.
- bpo-19723: The marker comments Argument Clinic uses have been changed toimprove readability.
- bpo-20157: When Argument Clinic renames a parameter because its namecollides with a C keyword, it no longer exposes that rename toPyArg_Parse.
- bpo-20141: Improved Argument Clinic’s support for the PyArg_Parse “O!”format unit.
- bpo-20144: Argument Clinic now supports simple symbolic constants asparameter default values.
- bpo-20143: The line numbers reported in Argument Clinic errors are nowmore accurate.
- bpo-20142: Py_buffer variables generated by Argument Clinic are nowinitialized with a default value.
Python 3.4.0 beta 2¶
Release date: 2014-01-05
Core and Builtins¶
- bpo-17432: Drop UCS2 from names of Unicode functions in python3.def.
- bpo-19526: Exclude all new API from the stable ABI. Exceptions can be madeif a need is demonstrated.
- bpo-19969: PyBytes_FromFormatV() now raises an OverflowError if “%c”argument is not in range [0; 255].
- bpo-19995: %c, %o, %x, and %X now issue a DeprecationWarning onnon-integer input; reworded docs to clarify that an integer type shoulddefine both __int__ and __index__.
- bpo-19787: PyThread_set_key_value() now always set the value. In Python3.3, the function did nothing if the key already exists (if the currentvalue is a non-NULL pointer).
- bpo-14432: Remove the thread state field from the frame structure. Fix acrash when a generator is created in a C thread that is destroyed whilethe generator is still used. The issue was that a generator contains aframe, and the frame kept a reference to the Python state of the destroyedC thread. The crash occurs when a trace function is setup.
- bpo-19576: PyGILState_Ensure() now initializes threads. At startup, Pythonhas no concrete GIL. If PyGILState_Ensure() is called from a new threadfor the first time and PyEval_InitThreads() was not called yet, a GILneeds to be created.
- bpo-17576: Deprecation warning emitted now when __int__() or __index__()return not int instance.
- bpo-19932: Fix typo in import.h, missing whitespaces in functionprototypes.
- bpo-19736: Add module-level statvfs constants defined for GNU/glibc basedsystems.
- bpo-20097: Fix bad use of “self” in importlib’s WindowsRegistryFinder.
- bpo-19729: In str.format(), fix recursive expansion in format spec.
- bpo-19638: Fix possible crash / undefined behaviour from huge (more than 2billion characters) input strings in _Py_dg_strtod.
Library¶
- bpo-20154: Deadlock in asyncio.StreamReader.readexactly().
- bpo-16113: Remove sha3 module again.
- bpo-20111: pathlib.Path.with_suffix() now sanity checks the given suffix.
- Fix breakage in TestSuite.countTestCases() introduced bybpo-11798.
- bpo-20108: Avoid parameter name clash in inspect.getcallargs().
- bpo-19918: Fix PurePath.relative_to() under Windows.
- bpo-19422: Explicitly disallow non-SOCK_STREAM sockets in the ssl module,rather than silently let them emit clear text data.
- bpo-20046: Locale alias table no longer contains entities which can becalculated. Generalized support of the euro modifier.
- bpo-20027: Fixed locale aliases for devanagari locales.
- bpo-20067: Tkinter variables now work when wantobjects is false.
- bpo-19020: Tkinter now uses splitlist() instead of split() in configuremethods.
- bpo-19744: ensurepip now provides a better error message when Python isbuilt without SSL/TLS support (pip currently requires that support to run,even if only operating with local wheel files)
- bpo-19734: ensurepip now ignores all pip environment variables to avoidodd behaviour based on user configuration settings
- Fix TypeError on “setup.py upload –show-response”.
- bpo-20045: Fix “setup.py register –list-classifiers”.
- bpo-18879: When a method is looked up on a temporary file, avoid closingthe file before the method is possibly called.
- bpo-20037: Avoid crashes when opening a text file late at interpretershutdown.
- bpo-19967: Thanks to the PEP 442, asyncio.Future now uses a destructor tolog uncaught exceptions, instead of the dedicated _TracebackLogger class.
- Added a Task.current_task() class method to asyncio.
- bpo-19850: Set SA_RESTART in asyncio when registering a signal handler tolimit EINTR occurrences.
- Implemented write flow control in asyncio for proactor event loop(Windows).
- Change write buffer in asyncio use to avoid O(N**2) behavior. Makewrite()/sendto() accept bytearray/memoryview.
- bpo-20034: Updated alias mapping to most recent locale.alias file fromX.org distribution using makelocalealias.py.
- bpo-5815: Fixed support for locales with modifiers. Fixed support forlocale encodings with hyphens.
- bpo-20026: Fix the sqlite module to handle correctly invalid isolationlevel (wrong type).
- bpo-18829: csv.Dialect() now checks type for delimiter, escapechar andquotechar fields. Original patch by Vajrasky Kok.
- bpo-19855: uuid.getnode() on Unix now looks on the PATH for theexecutables used to find the mac address, with /sbin and /usr/sbin asfallbacks.
- bpo-20007: HTTPResponse.read(0) no more prematurely closes connection.Original patch by Simon Sapin.
- bpo-19946: multiprocessing now uses runpy to initialize __main__ in childprocesses when necessary, allowing it to correctly handle scripts withoutsuffixes and submodules that use explicit relative imports or otherwiserely on parent modules being correctly imported prior to execution.
- bpo-19921: When Path.mkdir() is called with parents=True, any missingparent is created with the default permissions, ignoring the mode argument(mimicking the POSIX “mkdir -p” command).
- bpo-19887: Improve the Path.resolve() algorithm to support certain symlinkchains.
- bpo-19912: Fixed numerous bugs in ntpath.splitunc().
- bpo-19911: ntpath.splitdrive() now correctly processes the ‘İ’ character(U+0130, LATIN CAPITAL LETTER I WITH DOT ABOVE).
- bpo-19532: python -m compileall with no filename/directory arguments nowrespects the -f and -q flags instead of ignoring them.
- bpo-19623: Fixed writing to unseekable files in the aifc module.
- bpo-19946: multiprocessing.spawn now raises ImportError when the module tobe used as the main module cannot be imported.
- bpo-17919: select.poll.register() again works with poll.POLLNVAL on AIX.Fixed integer overflow in the eventmask parameter.
- bpo-19063: if a Charset’s body_encoding was set to None, the email packagewould generate a message claiming the Content-Transfer-Encoding was 7bit,and produce garbage output for the content. This now works. A couple ofother set_payload mishandlings of non-ASCII are also fixed. In addition,calling set_payload with a string argument without specifying a charsetnow raises an error (this is a new error in 3.4).
- bpo-15475: Add __sizeof__ implementations for itertools objects.
- bpo-19944: Fix importlib.find_spec() so it imports parents as needed andmove the function to importlib.util.
- bpo-19880: Fix a reference leak in unittest.TestCase. Explicitly breakreference cycles between frames and the _Outcome instance.
- bpo-17429: platform.linux_distribution() now decodes files from the UTF-8encoding with the surrogateescape error handler, instead of decoding fromthe locale encoding in strict mode. It fixes the function on Fedora 19which is probably the first major distribution release with a non-ASCIIname. Patch written by Toshio Kuratomi.
- bpo-19343: Expose FreeBSD-specific APIs in resource module. Originalpatch by Koobs.
- bpo-19929: Call os.read with 32768 within subprocess.Popen.communicaterather than 4096 for efficiency. A microbenchmark shows Linux and OS Xboth using ~50% less cpu time this way.
- bpo-19506: Use a memoryview to avoid a data copy when piping data to stdinwithin subprocess.Popen.communicate. 5-10% less cpu usage.
- bpo-19876: selectors unregister() no longer raises ValueError or OSErrorif the FD is closed (as long as it was registered).
- bpo-19908: pathlib now joins relative Windows paths correctly when a driveis present. Original patch by Antoine Pitrou.
- bpo-19296: Silence compiler warning in dbm_open
- bpo-6784: Strings from Python 2 can now be unpickled as bytes objects bysetting the encoding argument of Unpickler to be ‘bytes’. Initial patch byMerlijn van Deen.
- bpo-19839: Fix regression in bz2 module’s handling of non-bzip2 data atEOF, and analogous bug in lzma module.
- bpo-19881: Fix pickling bug where cpickle would emit bad pickle data forlarge bytes string (i.e., with size greater than 2**32-1).
- bpo-19138: doctest’s IGNORE_EXCEPTION_DETAIL now allows a match when noexception detail exists (no colon following the exception’s name, or acolon does follow but no text follows the colon).
- bpo-19927: Add __eq__ to path-based loaders in importlib.
- bpo-19827: On UNIX, setblocking() and settimeout() methods ofsocket.socket can now avoid a second syscall if the ioctl() function canbe used, or if the non- blocking flag of the socket is unchanged.
- bpo-19785: smtplib now supports SSLContext.check_hostname and server nameindication for TLS/SSL connections.
- bpo-19784: poplib now supports SSLContext.check_hostname and server nameindication for TLS/SSL connections.
- bpo-19783: nntplib now supports SSLContext.check_hostname and server nameindication for TLS/SSL connections.
- bpo-19782: imaplib now supports SSLContext.check_hostname and server nameindication for TLS/SSL connections.
- bpo-20123: Fix pydoc.synopsis() for “binary” modules.
- bpo-19834: Support unpickling of exceptions pickled by Python 2.
- bpo-19781: ftplib now supports SSLContext.check_hostname and server nameindication for TLS/SSL connections.
- bpo-19509: Add SSLContext.check_hostname to match the peer’s certificatewith server_hostname on handshake.
- bpo-15798: Fixed subprocess.Popen() to no longer fail if file descriptor0, 1 or 2 is closed.
- bpo-17897: Optimized unpickle prefetching.
- bpo-3693: Make the error message more helpful when the array.array()constructor is given a str. Move the array module typecode documentationto the docstring of the constructor.
- bpo-19088: Fixed incorrect caching of the copyreg module inobject.__reduce__() and object.__reduce_ex__().
- bpo-19698: Removed exec_module() methods fromimportlib.machinery.BuiltinImporter and ExtensionFileLoader.
- bpo-18864: Added a setter for ModuleSpec.has_location.
- Fixed _pickle.Unpickler to not fail when loading empty strings aspersistent IDs.
- bpo-11480: Fixed copy.copy to work with classes with custom metaclasses.Patch by Daniel Urban.
- bpo-6477: Added support for pickling the types of built-in singletons(i.e., Ellipsis, NotImplemented, None).
- bpo-19713: Add remaining PEP 451-related deprecations and move away fromusing find_module/find_loaer/load_module.
- bpo-19708: Update pkgutil to use the new importer APIs.
- bpo-19703: Update pydoc to use the new importer APIs.
- bpo-19851: Fixed a regression in reloading sub-modules.
- ssl.create_default_context() sets OP_NO_COMPRESSION to prevent CRIME.
- bpo-19802: Add socket.SO_PRIORITY.
- bpo-11508: Fixed uuid.getnode() and uuid.uuid1() on environment withvirtual interface. Original patch by Kent Frazier.
- bpo-11489: JSON decoder now accepts lone surrogates.
- bpo-19545: Avoid chained exceptions while passing stray % totime.strptime(). Initial patch by Claudiu Popa.
IDLE¶
Tests¶
- bpo-20055: Fix test_shutil under Windows with symlink privileges held.Patch by Vajrasky Kok.
- bpo-20070: Don’t run test_urllib2net when network resources are notenabled.
- bpo-19938: Re-enabled test_bug_1333982 in test_dis, which had beendisabled since 3.0 due to the changes in listcomp handling.
- bpo-19320: test_tcl no longer fails when wantobjects is false.
- bpo-19919: Fix flaky SSL test. connect_ex() sometimes returns EWOULDBLOCKon Windows or VMs hosted on Windows.
- bpo-19912: Added tests for ntpath.splitunc().
- bpo-19828: Fixed test_site when the whole suite is run with -S.
- bpo-19928: Implemented a test for repr() of cell objects.
- bpo-19535: Fixed test_docxmlrpc, test_functools, test_inspect, andtest_statistics when python is run with -OO.
- bpo-19926: Removed unneeded test_main from test_abstract_numbers. Patch byVajrasky Kok.
- bpo-19572: More skipped tests explicitly marked as skipped.
- bpo-19595: Re-enabled a long-disabled test in test_winsound. (See also:bpo-19987)
- bpo-19588: Fixed tests in test_random that were silently skipped most ofthe time. Patch by Julian Gindi.
Build¶
- bpo-19728: Enable pip installation by default on Windows.
- bpo-16136: Remove VMS support
- bpo-18215: Add script Tools/ssl/test_multiple_versions.py to compile andrun Python’s unit tests with multiple versions of OpenSSL.
- bpo-19922: define _INCLUDE__STDC_A1_SOURCE in HP-UX to include mbstate_tfor mbrtowc().
- bpo-19788: kill_python(_d).exe is now run as a PreBuildEvent on thepythoncore sub- project. This should prevent build errors due a previousbuild’s python(_d).exe still running.
Documentation¶
- bpo-20265: Updated some parts of the Using Windows document.
- bpo-20266: Updated some parts of the Windows FAQ.
- bpo-20255: Updated the about and bugs pages.
- bpo-20253: Fixed a typo in the ipaddress docs that advertised an illegalattribute name. Found by INADA Naoki.
- bpo-18840: Introduce the json module in the tutorial, and de-emphasize thepickle module.
- bpo-19845: Updated the Compiling Python on Windows section.
- bpo-19795: Improved markup of True/False constants.
Python 3.4.0 beta 1¶
Release date: 2013-11-24
Core and Builtins¶
- Use the repr of a module name in more places in import, especiallyexceptions.
- bpo-19619: str.encode, bytes.decode and bytearray.decode now use aninternal API to throw LookupError for known non-text encodings, ratherthan attempting the encoding or decoding operation and then throwing aTypeError for an unexpected output type. (The latter mechanism remains inplace for third party non-text encodings)
- bpo-19183: Implement PEP 456 ‘secure and interchangeable hash algorithm’.Python now uses SipHash24 on all major platforms.
- bpo-12892: The utf-16* and utf-32* encoders no longer allow surrogate codepoints (U+D800-U+DFFF) to be encoded. The utf-32* decoders no longerdecode byte sequences that correspond to surrogate code points. Thesurrogatepass error handler now works with the utf-16* and utf-32* codecs.Based on patches by Victor Stinner and Kang-Hao (Kenny) Lu.
- bpo-17806: Added keyword-argument support for “tabsize” tostr/bytes.expandtabs().
- bpo-17828: Output type errors in str.encode(), bytes.decode() andbytearray.decode() now direct users to codecs.encode() or codecs.decode()as appropriate.
- bpo-17828: The interpreter now attempts to chain errors that occur incodec processing with a replacement exception of the same type thatincludes the codec name in the error message. It ensures it only does thiswhen the creation of the replacement exception won’t lose any information.
- bpo-19466: Clear the frames of daemon threads earlier during the Pythonshutdown to call object destructors. So “unclosed file” resource warningsare now correctly emitted for daemon threads.
- bpo-19514: Deduplicate some _Py_IDENTIFIER declarations. Patch by AndreiDorian Duma.
- bpo-17936: Fix O(n**2) behaviour when adding or removing many subclassesof a given type.
- bpo-19428: zipimport now handles errors when reading truncated or invalidZIP archive.
- bpo-18408: Add a new PyFrame_FastToLocalsWithError() function to handleexceptions when merging fast locals into f_locals of a frame.PyEval_GetLocals() now raises an exception and return NULL on failure.
- bpo-19369: Optimized the usage of __length_hint__().
- bpo-18603: Ensure that PyOS_mystricmp and PyOS_mystrnicmp are in thePython executable and not removed by the linker’s optimizer.
- bpo-19306: Add extra hints to the faulthandler module’s stack dumps thatthese are “upside down”.
Library¶
- bpo-3158: doctest can now find doctests in functions and methods writtenin C.
- bpo-13477: Added command line interface to the tarfile module. Originalpatch by Berker Peksag.
- bpo-19674: inspect.signature() now produces a correct signature for somebuiltins.
- bpo-19722: Added opcode.stack_effect(), which computes the stack effect ofbytecode instructions.
- bpo-19735: Implement private function ssl._create_stdlib_context() tocreate SSLContext objects in Python’s stdlib module. It provides a singleconfiguration point and makes use of SSLContext.load_default_certs().
- bpo-16203: Add re.fullmatch() function and regex.fullmatch() method, whichanchor the pattern at both ends of the string to match. Original patch byMatthew Barnett.
- bpo-13592: Improved the repr for regular expression pattern objects. Basedon patch by Hugo Lopes Tavares.
- bpo-19641: Added the audioop.byteswap() function to convert big-endiansamples to little-endian and vice versa.
- bpo-15204: Deprecated the ‘U’ mode in file-like objects.
- bpo-17810: Implement PEP 3154, pickle protocol 4.
- bpo-19668: Added support for the cp1125 encoding.
- bpo-19689: Add ssl.create_default_context() factory function. It creates anew SSLContext object with secure default settings.
- bpo-19727: os.utime(…, None) is now potentially more precise underWindows.
- bpo-17201: ZIP64 extensions now are enabled by default. Patch by WilliamMallard.
- bpo-19292: Add SSLContext.load_default_certs() to load default root CAcertificates from default stores or system stores. By default the methodloads CA certs for authentication of server certs.
- bpo-19673: Add pathlib to the stdlib as a provisional module (PEP 428).
- bpo-16596: pdb in a generator now properly skips over yield and yield fromrather than stepping out of the generator into its caller. (This isessential for stepping through asyncio coroutines.)
- bpo-17916: Added dis.Bytecode.from_traceback() anddis.Bytecode.current_offset to easily display “current instruction”markers in the new disassembly API (Patch by Claudiu Popa).
- bpo-19552: venv now supports bootstrapping pip into virtual environments
- bpo-17134: Finalize interface to Windows’ certificate store. Cert and CRLenumeration are now two functions. enum_certificates() also returnspurpose flags as set of OIDs.
- bpo-19555: Restore sysconfig.get_config_var(‘SO’), (and the distutilsequivalent) with a DeprecationWarning pointing people at $EXT_SUFFIX.
- bpo-8813: Add SSLContext.verify_flags to change the verification flags ofthe context in order to enable certification revocation list (CRL) checksor strict X509 rules.
- bpo-18294: Fix the zlib module to make it 64-bit safe.
- bpo-19682: Fix compatibility issue with old version of OpenSSL that wasintroduced bybpo-18379.
- bpo-14455: plistlib now supports binary plists and has an updated API.
- bpo-19633: Fixed writing not compressed 16- and 32-bit wave files onbig-endian platforms.
- bpo-18379: SSLSocket.getpeercert() returns CA issuer AIA fields, OCSP andCRL distribution points.
- bpo-18138: Implement cadata argument of SSLContext.load_verify_location()to load CA certificates and CRL from memory. It supports PEM and DERencoded strings.
- bpo-18775: Add name and block_size attribute to HMAC object. They nowprovide the same API elements as non-keyed cryptographic hash functions.
- bpo-17276: MD5 as default digestmod for HMAC is deprecated. The HMACmodule supports digestmod names, e.g. hmac.HMAC(‘sha1’).
- bpo-19449: in csv’s writerow, handle non-string keys when generating theerror message that certain keys are not in the ‘fieldnames’ list.
- bpo-13633: Added a new convert_charrefs keyword arg to HTMLParser that,when True, automatically converts all character references.
- bpo-2927: Added the unescape() function to the html module.
- bpo-8402: Added the escape() function to the glob module.
- bpo-17618: Add Base85 and Ascii85 encoding/decoding to the base64 module.
- bpo-19634: time.strftime(“%y”) now raises a ValueError on AIX when given ayear before 1900.
- Fix test.support.bind_port() to not cause an error when Python wascompiled on a system with SO_REUSEPORT defined in the headers but run on asystem with an OS kernel that does not support that reasonably new socketoption.
- Fix compilation error under gcc of the ctypes module bundled libffi forarm.
- bpo-19448: Add private API to SSL module to lookup ASN.1 objects by OID,NID, short name and long name.
- bpo-19282: dbm.open now supports the context management protocol. (Initialpatch by Claudiu Popa)
- bpo-8311: Added support for writing any bytes-like objects in the aifc,sunau, and wave modules.
- bpo-5202: Added support for unseekable files in the wave module.
- bpo-19544: Restore global option to ignore ~/.pydistutils.cfg inDistutils, accidentally removed in backout of distutils2 changes. (Seealso:bpo-1180)
- bpo-19523: Closed FileHandler leak which occurred when delay was set.
- bpo-19544: Restore support for –user and –group parameters to sdistcommand accidentally rolled back as part of the distutils2 rollback. (Seealso:bpo-6516)
- bpo-13674: Prevented time.strftime from crashing on Windows when given ayear before 1900 and a format of %y.
- bpo-19406: implementation of the ensurepip module (part of PEP 453). Patchby Donald Stufft and Nick Coghlan.
- bpo-19544: Restore use of urllib over http allowing use of http_proxy forDistutils upload command, a feature accidentally lost in the rollback ofdistutils2. (See also:bpo-6286)
- bpo-19544: Restore the read_pkg_file method todistutils.dist.DistributionMetadata accidentally removed in the undo ofdistutils2. (See also:bpo-7457)
- bpo-16685: Added support for any bytes-like objects in the audioop module.Removed support for strings.
- bpo-7171: Add Windows implementation of
inet_ntopandinet_ptontosocket module. Patch by Atsuo Ishimoto. - bpo-19261: Added support for writing 24-bit samples in the sunau module.
- bpo-1097797: Added CP273 encoding, used on IBM mainframes in Germany andAustria. Mapping provided by Michael Bierenfeld.
- bpo-1575020: Fixed support of 24-bit wave files on big-endian platforms.
- bpo-19378: Fixed a number of cases in the dis module where the new “file”parameter was not being honoured correctly
- bpo-19378: Removed the “dis.Bytecode.show_info” method
- bpo-19378: Renamed the “dis.Bytecode.display_code” method to“dis.Bytecode.dis” and converted it to returning a string rather thanprinting output.
- bpo-19378: the “line_offset” parameter in the new “dis.get_instructions”API has been renamed to “first_line” (and the default value and usagechanged accordingly). This should reduce confusion with the more commonuse of “offset” in the dis docs to refer to bytecode offsets.
- bpo-18678: Corrected spwd struct member names in spwd module:sp_nam->sp_namp, and sp_pwd->sp_pwdp. The old names are kept as extrastructseq members, for backward compatibility.
- bpo-6157: Fixed tkinter.Text.debug(). tkinter.Text.bbox() now raisesTypeError instead of TclError on wrong number of arguments. Originalpatch by Guilherme Polo.
- bpo-10197: Rework subprocess.get[status]output to use subprocessfunctionality and thus to work on Windows. Patch by Nick Coghlan
- bpo-6160: The bbox() method of tkinter.Spinbox now returns a tuple ofintegers instead of a string. Based on patch by Guilherme Polo.
- bpo-19403: contextlib.redirect_stdout is now reentrant
- bpo-19286: Directories in
package_dataare no longer added to thefilelist, preventing failure outlined in the ticket. - bpo-19480: HTMLParser now accepts all valid start-tag names as defined bythe HTML5 standard.
- bpo-15114: The html.parser module now raises a DeprecationWarning when thestrict argument of HTMLParser or the HTMLParser.error method are used.
- bpo-19410: Undo the special-casing removal of ‘’ forimportlib.machinery.FileFinder.
- bpo-19424: Fix the warnings module to accept filename containing surrogatecharacters.
- bpo-19435: Fix directory traversal attack on CGIHttpRequestHandler.
- bpo-19227: Remove pthread_atfork() handler. The handler was added to solve#18747 but has caused issues.
- bpo-19420: Fix reference leak in module initialization code of_hashopenssl.c
- bpo-19329: Optimized compiling charsets in regular expressions.
- bpo-19227: Try to fix deadlocks caused by re-seeding then OpenSSLpseudo-random number generator on fork().
- bpo-16037: HTTPMessage.readheaders() raises an HTTPException when morethan 100 headers are read. Adapted from patch by Jyrki Pulliainen.
- bpo-16040: CVE-2013-1752: nntplib: Limit maximum line lengths to 2048 toprevent readline() calls from consuming too much memory. Patch by JyrkiPulliainen.
- bpo-16041: CVE-2013-1752: poplib: Limit maximum line lengths to 2048 toprevent readline() calls from consuming too much memory. Patch by JyrkiPulliainen.
- bpo-17997: Change behavior of
ssl.match_hostname()to follow RFC 6125,for security reasons. It now doesn’t match multiple wildcards norwildcards inside IDN fragments. - bpo-16039: CVE-2013-1752: Change use of readline in imaplib module tolimit line length. Patch by Emil Lind.
- bpo-19330: the unnecessary wrapper functions have been removed from theimplementations of the new contextlib.redirect_stdout andcontextlib.suppress context managers, which also ensures they providereasonable help() output on instances
- bpo-19393: Fix symtable.symtable function to not be confused when thereare functions or classes named “top”.
- bpo-18685: Restore re performance to pre-PEP 393 levels.
- bpo-19339: telnetlib module is now using time.monotonic() when availableto compute timeout.
- bpo-19399: fix sporadic test_subprocess failure.
- bpo-13234: Fix os.listdir to work with extended paths on Windows. Patch bySantoso Wijaya.
- bpo-19375: The site module adding a “site-python” directory to sys.path,if it exists, is now deprecated.
- bpo-19379: Lazily import linecache in the warnings module, to make startupwith warnings faster until a warning gets printed.
- bpo-19288: Fixed the “in” operator of dbm.gnu databases for stringargument. Original patch by Arfrever Frehtes Taifersar Arahesis.
- bpo-19287: Fixed the “in” operator of dbm.ndbm databases for stringargument. Original patch by Arfrever Frehtes Taifersar Arahesis.
- bpo-19327: Fixed the working of regular expressions with too big charset.
- bpo-17400: New ‘is_global’ attribute for ipaddress to tell if an addressis allocated by IANA for global or private networks.
- bpo-19350: Increasing the test coverage of macurl2path. Patch by ColinWilliams.
- bpo-19365: Optimized the parsing of long replacement string in re.sub*()functions.
- bpo-19352: Fix unittest discovery when a module can be reached throughseveral paths (e.g. under Debian/Ubuntu with virtualenv).
- bpo-15207: Fix mimetypes to read from correct part of Windows registryOriginal patch by Dave Chambers
- bpo-16595: Add prlimit() to resource module.
- bpo-19324: Expose Linux-specific constants in resource module.
- Load SSL’s error strings in hashlib.
- bpo-18527: Upgrade internal copy of zlib to 1.2.8.
- bpo-19274: Add a filterfunc parameter to PyZipFile.writepy.
- bpo-8964: fix platform._sys_version to handle IronPython 2.6+. Patch byMartin Matusiak.
- bpo-19413: Restore pre-3.3 reload() semantics of re-finding modules.
- bpo-18958: Improve error message for json.load(s) while passing a stringthat starts with a UTF-8 BOM.
- bpo-19307: Improve error message for json.load(s) while passing objects ofthe wrong type.
- bpo-16038: CVE-2013-1752: ftplib: Limit amount of data read by limitingthe call to readline(). Original patch by Michał Jastrzębski andGiampaolo Rodola.
- bpo-17087: Improved the repr for regular expression match objects.
Tests¶
- bpo-19664: test_userdict’s repr test no longer depends on the order ofdict elements.
- bpo-19440: Clean up test_capi by removing an unnecessary __future__import, converting from test_main to unittest.main, and running the_testcapi module tests as subTests of a unittest TestCase method.
- bpo-19378: the main dis module tests are now run with both stdoutredirectionand passing an explicit file parameter
- bpo-19378: removed the not-actually-helpful assertInstructionMatches andassertBytecodeExactlyMatches helpers from bytecode_helper
- bpo-18702: All skipped tests now reported as skipped.
- bpo-19439: interpreter embedding tests are now executed on Windows (Patchby Zachary Ware)
- bpo-19085: Added basic tests for all tkinter widget options.
- bpo-19384: Fix test_py_compile for root user, patch by Claudiu Popa.
Documentation¶
- bpo-18326: Clarify that list.sort’s arguments are keyword-only. Also,attempt to reduce confusion in the glossary by not saying there aredifferent “types” of arguments and parameters.
Build¶
- bpo-19358: “make clinic” now runs the Argument Clinic preprocessor overall CPython source files.
- Update SQLite to 3.8.1, xz to 5.0.5, and Tcl/Tk to 8.6.1 on Windows.
- bpo-16632: Enable DEP and ASLR on Windows.
- bpo-17791: Drop PREFIX and EXEC_PREFIX definitions from PC/pyconfig.h
- Add workaround for VS 2010 nmake clean issue. VS 2010 doesn’t set up PATHfor nmake.exe correctly.
- bpo-19550: Implement Windows installer changes of PEP 453 (ensurepip).
- bpo-19520: Fix compiler warning in the _sha3 module on 32bit Windows.
- bpo-19356: Avoid using a C variabled named “_self”, it’s a reserved wordin some C compilers.
- bpo-15792: Correct build options on Win64. Patch by Jeremy Kloth.
- bpo-19373: Apply upstream change to Tk 8.5.15 fixing OS X 10.9 screenrefresh problem for OS X installer build.
- bpo-19649: On OS X, the same set of file names are now installed in bindirectories for all configurations: non-framework vs framework, and singlearch vs universal builds. pythonx.y-32 is now always installed for64-bit/32-bit universal builds. The obsolete and undocumented pythonw*symlinks are no longer installed anywhere.
- bpo-19553: PEP 453 - “make install” and “make altinstall” now install orupgrade pip by default, using the bundled pip provided by the newensurepip module. A new configure option,–with-ensurepip[=upgrade|install|no], is available to override thedefault ensurepip “–upgrade” option. The option can also be set with“make [alt]install ENSUREPIP=[upgrade|install|no]”.
- bpo-19551: PEP 453 - the OS X installer now installs pip by default.
- Update third-party libraries for OS X installers: xz 5.0.3 -> 5.0.5,SQLite 3.7.13 -> 3.8.1
- bpo-15663: Revert OS X installer built-in Tcl/Tk support for 3.4.0b1. Somethird-party projects, such as Matplotlib and PIL/Pillow, depended on beingable to build with Tcl and Tk frameworks in /Library/Frameworks.
Tools/Demos¶
- bpo-19730: Argument Clinic now supports all the existing PyArg “formatunits” as legacy converters, as well as two new features: “selfconverters” and the “version” directive.
- bpo-19552: pyvenv now bootstraps pip into virtual environments by default(pass –without-pip to request the old behaviour)
- bpo-19390: Argument Clinic no longer accepts malformed Python and C ids.
Python 3.4.0 alpha 4¶
Release date: 2013-10-20
Core and Builtins¶
- bpo-19301: Give classes and functions that are explicitly marked global aglobal qualname.
- bpo-19279: UTF-7 decoder no longer produces illegal strings.
- bpo-16612: Add “Argument Clinic”, a compile-time preprocessor for C filesto generate argument parsing code. (See PEP 436.)
- bpo-18810: Shift stat calls in importlib.machinery.FileFinder such thatthe code is optimistic that if something exists in a directory namedexactly like the possible package being searched for that it’s inactuality a directory.
- bpo-18416: importlib.machinery.PathFinder now treats ‘’ as the cwd andimportlib.machinery.FileFinder no longer special-cases ‘’ to ‘.’. Thisleads to modules imported from cwd to now possess an absolute file pathfor __file__ (this does not affect modules specified by path on the CLIbut it does affect -m/runpy). It also allows FileFinder to be moreconsistent by not having an edge case.
- bpo-4555: All exported C symbols are now prefixed with either “Py” or“_Py”.
- bpo-19219: Speed up marshal.loads(), and make pyc files slightly (5% to10%) smaller.
- bpo-19221: Upgrade Unicode database to version 6.3.0.
- bpo-16742: The result of the C callback PyOS_ReadlineFunctionPointer mustnow be a string allocated by PyMem_RawMalloc() or PyMem_RawRealloc() (orNULL if an error occurred), instead of a string allocated byPyMem_Malloc() or PyMem_Realloc().
- bpo-19199: Remove
PyThreadState.tick_counterfield - Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in atleast one place so as to avoid regressions.
- bpo-19087: Improve bytearray allocation in order to allow cheap popping ofdata at the front (slice deletion).
- bpo-19014: memoryview.cast() is now allowed on zero-length views.
- bpo-18690: memoryview is now automatically registered withcollections.abc.Sequence
- bpo-19078: memoryview now correctly supports the reversed builtin (Patchby Claudiu Popa)
Library¶
- bpo-17457: unittest test discovery now works with namespace packages.Patch by Claudiu Popa.
- bpo-18235: Fix the sysconfig variables LDSHARED and BLDSHARED under AIX.Patch by David Edelsohn.
- bpo-18606: Add the new “statistics” module (PEP 450). Contributed bySteven D’Aprano.
- bpo-12866: The audioop module now supports 24-bit samples.
- bpo-19254: Provide an optimized Python implementation of pbkdf2_hmac.
- bpo-19201: Add “x” mode (exclusive creation) in opening file to bz2, gzipand lzma modules. Patches by Tim Heaney and Vajrasky Kok. (See also:bpo-19222,bpo-19223)
- Fix a reference count leak in _sre.
- bpo-19262: Initial check in of the ‘asyncio’ package (a.k.a. Tulip, a.k.a.PEP 3156). There are no docs yet, and the PEP is slightly out of date withthe code. This module will haveprovisional status in Python 3.4.
- bpo-19276: Fixed the wave module on 64-bit big-endian platforms.
- bpo-19266: Rename the new-in-3.4
contextlib.ignorecontext manager tocontextlib.suppressin order to be more consistent with existingdescriptions of that operation elsewhere in the language and standardlibrary documentation (Patch by Zero Piraeus). - bpo-18891: Completed the new email package (provisional) API additions byadding new classes EmailMessage, MIMEPart, and ContentManager.
- bpo-18281: Unused stat constants removed from
tarfile. - bpo-18999: Multiprocessing now supports ‘contexts’ with the same API asthe module, but bound to specified start methods.
- bpo-18468: The re.split, re.findall, and re.sub functions and the group()and groups() methods of match object now always return a string or a bytesobject.
- bpo-18725: The textwrap module now supports truncating multiline text.
- bpo-18776: atexit callbacks now display their full traceback when theyraise an exception.
- bpo-17827: Add the missing documentation for
codecs.encodeandcodecs.decode. - bpo-19218: Rename collections.abc to _collections_abc in order to speed upinterpreter start.
- bpo-18582: Add ‘pbkdf2_hmac’ to the hashlib module. It implements PKCS#5password-based key derivation functions with HMAC as pseudorandomfunction.
- bpo-19131: The aifc module now correctly reads and writes sampwidth ofcompressed streams.
- bpo-19209: Remove import of copyreg from the os module to speed upinterpreter startup. stat_result and statvfs_result are now hard-coded toreside in the os module.
- bpo-19205: Don’t import the ‘re’ module in site and sysconfig module tospeed up interpreter start.
- bpo-9548: Add a minimal “_bootlocale” module that is imported by the _iomodule instead of the full locale module.
- bpo-18764: Remove the ‘print’ alias for the PDB ‘p’ command so that it nolonger shadows the print function.
- bpo-19158: A rare race in BoundedSemaphore could allow .release() toooften.
- bpo-15805: Add contextlib.redirect_stdout().
- bpo-18716: Deprecate the formatter module.
- bpo-10712: 2to3 has a new “asserts” fixer that replaces deprecated namesof unittest methods (e.g. failUnlessEqual -> assertEqual).
- bpo-18037: 2to3 now escapes
'\u'and'\U'in native strings. - bpo-17839: base64.decodebytes and base64.encodebytes now accept any objectthat exports a 1 dimensional array of bytes (this means the same is nowalso true for base64_codec)
- bpo-19132: The pprint module now supports compact mode.
- bpo-19137: The pprint module now correctly formats instances of set andfrozenset subclasses.
- bpo-10042: functools.total_ordering now correctly handles NotImplementedbeing returned by the underlying comparison function (Patch by KatieMiller)
- bpo-19092: contextlib.ExitStack now correctly reraises exceptions from the__exit__ callbacks of inner context managers (Patch by Hrvoje Nikšić)
- bpo-12641: Avoid passing “-mno-cygwin” to the mingw32 compiler, exceptwhen necessary. Patch by Oscar Benjamin.
- bpo-5845: In site.py, only load readline history from ~/.python_history ifno history has been read already. This avoids double writes to thehistory file at shutdown.
- Properly initialize all fields of a SSL object after allocation.
- bpo-19095: SSLSocket.getpeercert() now raises ValueError when the SSLhandshake hasn’t been done.
- bpo-4366: Fix building extensions on all platforms when –enable-shared isused.
- bpo-19030: Fixed
inspect.getmembersandinspect.classify_class_attrsto attempt activating descriptors before falling back to a __dict__ searchfor faulty descriptors.inspect.classify_class_attrsno longer returnsAttributes whose home class is None.
C API¶
- bpo-1772673: The type of
char*arguments now changed toconstchar*. - bpo-16129: Added a
Py_SetStandardStreamEncodingpre-initialization APIto allow embedding applications like Blender to force a particularencoding and error handler for the standard IO streams (initial patch byBastien Montagne)
Tests¶
Documentation¶
Build¶
- bpo-19130: Correct PCbuild/readme.txt, Python 3.3 and 3.4 require VS 2010.
- bpo-15663: Update OS X 10.6+ installer to use Tcl/Tk 8.5.15.
- bpo-14499: Fix several problems with OS X universal build support: 1.ppc arch detection for extension module builds broke with Xcode 5 2. ppcarch detection in configure did not work on OS X 10.4 3. -sysroot and-arch flags were unnecessarily duplicated 4. there was no obvious way toconfigure an intel-32 only build.
- bpo-19019: Change the OS X installer build script to use CFLAGS instead ofOPT for special build options. By setting OPT, some compiler-specificoptions like -fwrapv were overridden and thus not used, which could resultin broken interpreters when building with clang.
Python 3.4.0 alpha 3¶
Release date: 2013-09-29
Core and Builtins¶
Library¶
- bpo-18929:
inspect.classify_class_attrs()now correctly finds classattributes returned bydir()that are located in the metaclass. - bpo-18950: Fix miscellaneous bugs in the sunau module.Au_read.readframes() now updates current file position and reads correctnumber of frames from multichannel stream. Au_write.writeframesraw() nowcorrectly updates current file position. Au_read.getnframes() now returnsan integer (as in Python 2). Au_read and Au_write now correctly works withfile object if start file position is not a zero.
- bpo-18594: The fast path for collections.Counter() was never taken due toan over- restrictive type check.
- bpo-19053: ZipExtFile.read1() with non-zero argument no more returns emptybytes until end of data.
- logging: added support for Unix domain sockets to SocketHandler andDatagramHandler.
- bpo-18996: TestCase.assertEqual() now more cleverly shorten differingstrings in error report.
- bpo-19034: repr() for tkinter.Tcl_Obj now exposes string reperesentation.
- bpo-18978:
urllib.request.Requestnow allows the method to beindicated on the class and no longer sets it to None in__init__. - bpo-18626: the inspect module now offers a basic command lineintrospection interface (Initial patch by Claudiu Popa)
- bpo-3015: Fixed tkinter with wantobject=False. Any Tcl command callreturned empty string.
- bpo-19037: The mailbox module now makes all changes to maildir filesbefore moving them into place, to avoid race conditions with otherprograms that may be accessing the maildir directory.
- bpo-14984: On POSIX systems, when netrc is called without a filenameargument (and therefore is reading the user’s $HOME/.netrc file), it nowenforces the same security rules as typical ftp clients: the .netrc filemust be owned by the user that owns the process and must not be readableby any other user.
- bpo-18873: The tokenize module now detects Python source code encodingonly in comment lines.
- bpo-17764: Enable http.server to bind to a user specified networkinterface. Patch contributed by Malte Swart.
- bpo-18937: Add an assertLogs() context manager to unittest.TestCase toensure that a block of code emits a message using the logging module.
- bpo-17324: Fix http.server’s request handling case on trailing ‘/’. Patchcontributed by Vajrasky Kok.
- bpo-19018: The heapq.merge() function no longer suppresses IndexError inthe underlying iterables.
- bpo-18784: The uuid module no longer attempts to load libc via ctypes.CDLLif all the necessary functions have already been found in libuuid. Patchby Evgeny Sologubov.
- The
PYTHONFAULTHANDLERenvironment variable now only enables thefaulthandler module if the variable is non-empty. Same behaviour thanother variables likePYTHONDONTWRITEBYTECODE. - bpo-1565525: New function
traceback.clear_frameswill clear the localvariables of all the stack frames referenced by a traceback object.
Tests¶
- bpo-18952: Fix regression in support data downloads introduced whentest.support was converted to a package. Regression noticed by ZacharyWare.
IDLE¶
Python 3.4.0 alpha 2¶
Release date: 2013-09-09
Core and Builtins¶
- bpo-18942: sys._debugmallocstats() output was damaged on Windows.
- bpo-18571: Implementation of the PEP 446: file descriptors and filehandles are now created non-inheritable; add functionsos.get/set_inheritable(), os.get/set_handle_inheritable() andsocket.socket.get/set_inheritable().
- bpo-11619: The parser and the import machinery do not encode Unicodefilenames anymore on Windows.
- bpo-18808: Non-daemon threads are now automatically joined when asub-interpreter is shutdown (it would previously dump a fatal error).
- Remove support for compiling on systems without getcwd().
- bpo-18774: Remove last bits of GNU PTH thread code and thread_pth.h.
- bpo-18771: Add optimization to set object lookups to reduce the cost ofhash collisions. The core idea is to inspect a second key/hash pair foreach cache line retrieved.
- bpo-16105: When a signal handler fails to write to the file descriptorregistered with
signal.set_wakeup_fd(), report an exception instead ofignoring the error. - bpo-18722: Remove uses of the “register” keyword in C code.
- bpo-18667: Add missing “HAVE_FCHOWNAT” symbol to posix._have_functions.
- bpo-16499: Add command line option for isolated mode.
- bpo-15301: Parsing fd, uid, and gid parameters for builtins inModules/posixmodule.c is now far more robust.
- bpo-18368: PyOS_StdioReadline() no longer leaks memory when realloc()fail.
- bpo-17934: Add a clear() method to frame objects, to help clean upexpensive details (local variables) and break reference cycles.
- bpo-18780: %-formatting codes %d, %i, and %u now treat int-subclasses asint (displays value of int-subclass instead of str(int-subclass) ).
Library¶
- bpo-18808: Thread.join() now waits for the underlying thread state to bedestroyed before returning. This prevents unpredictable aborts inPy_EndInterpreter() when some non-daemon threads are still running.
- bpo-18458: Prevent crashes with newer versions of libedit. Its readlineemulation has changed from 0-based indexing to 1-based like gnu readline.
- bpo-18852: Handle case of
readline.__doc__beingNonein the newreadline activation code insite.py. - bpo-18672: Fixed format specifiers for Py_ssize_t in debugging output inthe _sre module.
- bpo-18830: inspect.getclasstree() no longer produces duplicate entrieseven when input list contains duplicates.
- bpo-18878: sunau.open now supports the context management protocol. Basedon patches by Claudiu Popa and R. David Murray.
- bpo-18909: Fix _tkinter.tkapp.interpaddr() on Windows 64-bit, don’t cast64-bit pointer to long (32 bits).
- bpo-18876: The FileIO.mode attribute now better reflects the actual modeunder which the file was opened. Patch by Erik Bray.
- bpo-16853: Add new selectors module.
- bpo-18882: Add threading.main_thread() function.
- bpo-18901: The sunau getparams method now returns a namedtuple rather thana plain tuple. Patch by Claudiu Popa.
- bpo-17487: The result of the wave getparams method now is pickleableagain. Patch by Claudiu Popa.
- bpo-18756: os.urandom() now uses a lazily-opened persistent filedescriptor, so as to avoid using many file descriptors when run inparallel from multiple threads.
- bpo-18418: After fork(), reinit all threads states, not only active ones.Patch by A. Jesse Jiryu Davis.
- bpo-17974: Switch unittest from using getopt to using argparse.
- bpo-11798: TestSuite now drops references to own tests after execution.
- bpo-16611: http.cookie now correctly parses the ‘secure’ and ‘httponly’cookie flags.
- bpo-11973: Fix a problem in kevent. The flags and fflags fields are nowproperly handled as unsigned.
- bpo-18807:
pyvenvnow takes a –copies argument allowing copiesinstead of symlinks even where symlinks are available and the default. - bpo-18538:
python-mdisnow uses argparse for argument processing.Patch by Michele Orrù. - bpo-18394: Close cgi.FieldStorage’s optional file.
- bpo-17702: On error, os.environb now suppresses the exception context whenraising a new KeyError with the original key.
- bpo-16809: Fixed some tkinter incompatibilities with Tcl/Tk 8.6.
- bpo-16809: Tkinter’s splitlist() and split() methods now accept Tcl_Objargument.
- bpo-18324: set_payload now correctly handles binary input. This alsosupersedes the previous fixes for #14360, #1717, and #16564.
- bpo-18794: Add a fileno() method and a closed attribute to select.devpollobjects.
- bpo-17119: Fixed integer overflows when processing large strings andtuples in the tkinter module.
- bpo-18747: Re-seed OpenSSL’s pseudo-random number generator after fork. Apthread_atfork() parent handler is used to seed the PRNG with pid, timeand some stack data.
- bpo-8865: Concurrent invocation of select.poll.poll() now raises aRuntimeError exception. Patch by Christian Schubert.
- bpo-18777: The ssl module now uses the new CRYPTO_THREADID API of OpenSSL1.0.0+ instead of the deprecated CRYPTO id callback function.
- bpo-18768: Correct doc string of RAND_edg(). Patch by Vajrasky Kok.
- bpo-18178: Fix ctypes on BSD. dlmalloc.c was compiled twice which brokemalloc weak symbols.
- bpo-18709: Fix CVE-2013-4238. The SSL module now handles NULL bytes insidesubjectAltName correctly. Formerly the module has used OpenSSL’sGENERAL_NAME_print() function to get the string representation of ASN.1strings for
rfc822Name(email),dNSName(DNS) anduniformResourceIdentifier(URI). - bpo-18701: Remove support of old CPython versions (<3.0) from C code.
- bpo-18756: Improve error reporting in os.urandom() when the failure is dueto something else than /dev/urandom not existing (for example, exhaustingthe file descriptor limit).
- bpo-18673: Add O_TMPFILE to os module. O_TMPFILE requires Linux kernel3.11 or newer. It’s only defined on system with 3.11 uapi headers, too.
- bpo-18532: Change the builtin hash algorithms’ names to lower case namesas promised by hashlib’s documentation.
- bpo-8713: add new spwan and forkserver start methods, and new functionsget_all_start_methods, get_start_method, and set_start_method, tomultiprocessing.
- bpo-18405: Improve the entropy of crypt.mksalt().
- bpo-12015: The tempfile module now uses a suffix of 8 random charactersinstead of 6, to reduce the risk of filename collision. The entropy wasreduced when uppercase letters were removed from the charset used togenerate random characters.
- bpo-18585: Add
textwrap.shorten()to collapse and truncate a pieceof text to a given length. - bpo-18598: Tweak exception message for importlib.import_module() toinclude the module name when a key argument is missing.
- bpo-19151: Fix docstring and use of _get_supported_file_loaders() toreflect 2-tuples.
- bpo-19152: Add ExtensionFileLoader.get_filename().
- bpo-18676: Change ‘positive’ to ‘non-negative’ in queue.py put and getdocstrings and ValueError messages. Patch by Zhongyue Luo
- Fix refcounting issue with extension types in tkinter.
- bpo-8112: xlmrpc.server’s DocXMLRPCServer server no longer raises an errorif methods have annotations; it now correctly displays the annotations.
- bpo-18600: Added policy argument to email.message.Message.as_string, andas_bytes and __bytes__ methods to Message.
- bpo-18671: Output more information when logging exceptions occur.
- bpo-18621: Prevent the site module’s patched builtins from keeping toomany references alive for too long.
- bpo-4885: Add weakref support to mmap objects. Patch by Valerie Lambert.
- bpo-8860: Fixed rounding in timedelta constructor.
- bpo-18849: Fixed a Windows-specific tempfile bug where collision with anexisting directory caused mkstemp and related APIs to fail instead ofretrying. Report and fix by Vlad Shcherbina.
- bpo-18920: argparse’s default destination for the version action (-v,–version) has also been changed to stdout, to match the Pythonexecutable.
Tests¶
- bpo-18623: Factor out the _SuppressCoreFiles context manager intotest.support. Patch by Valerie Lambert.
- bpo-12037: Fix test_email for desktop Windows.
- bpo-15507: test_subprocess’s test_send_signal could fail if the testrunner were run in an environment where the process inherited an ignoresetting for SIGINT. Restore the SIGINT handler to the desiredKeyboardInterrupt raising one during that test.
- bpo-16799: Switched from getopt to argparse style in regrtest’s argumentparsing. Added more tests for regrtest’s argument parsing.
- bpo-18792: Use “127.0.0.1” or “::1” instead of “localhost” as much aspossible, since “localhost” goes through a DNS lookup under recent Windowsversions.
Documentation¶
Build¶
- bpo-1584: Provide configure options to override default search paths forTcl and Tk when building _tkinter.
- bpo-15663: Tcl/Tk 8.5.14 is now included with the OS X 10.6+ 64-/32-bitinstaller. It is no longer necessary to install a third-party version ofTcl/Tk 8.5 to work around the problems in the Apple-supplied Tcl/Tk 8.5shipped in OS X 10.6 and later releases.
Python 3.4.0 alpha 1¶
Release date: 2013-08-03
Core and Builtins¶
- bpo-16741: Fix an error reporting in int().
- bpo-17899: Fix rare file descriptor leak in os.listdir().
- bpo-10241: Clear extension module dict copies at interpreter shutdown.Patch by Neil Schemenauer, minimally modified.
- bpo-9035: ismount now recognises volumes mounted below a drive root onWindows. Original patch by Atsuo Ishimoto.
- bpo-18214: Improve finalization of Python modules to avoid setting theirglobals to None, in most cases.
- bpo-18112: PEP 442 implementation (safe object finalization).
- bpo-18552: Check return value of PyArena_AddPyObject() inobj2ast_object().
- bpo-18560: Fix potential NULL pointer dereference in sum().
- bpo-18520: Add a new PyStructSequence_InitType2() function, same thanPyStructSequence_InitType() except that it has a return value (0 onsuccess, -1 on error).
- bpo-15905: Fix theoretical buffer overflow in handling of sys.argv[0],prefix and exec_prefix if the operation system does not obey MAXPATHLEN.
- bpo-18408: Fix many various bugs in code handling errors, especially onmemory allocation failure (MemoryError).
- bpo-18344: Fix potential ref-leaks in _bufferedreader_read_all().
- bpo-18342: Use the repr of a module name when an import fails when using
from...import.... - bpo-17872: Fix a segfault in marshal.load() when input stream returns morebytes than requested.
- bpo-18338:
python--versionnow prints version string to stdout, and notto stderr. Patch by Berker Peksag and Michael Dickens. - bpo-18426: Fix NULL pointer dereference in C extension import whenPyModule_GetDef() returns an error.
- bpo-17206: On Windows, increase the stack size from 2 MB to 4.2 MB to fixa stack overflow in the marshal module (fix a crash in test_marshal).Patch written by Jeremy Kloth.
- bpo-3329: Implement the PEP 445: Add new APIs to customize Python memoryallocators.
- bpo-18328: Reorder ops in PyThreadState_Delete*() functions. Now thetstate is first removed from TLS and then deallocated.
- bpo-13483: Use VirtualAlloc in obmalloc on Windows.
- bpo-18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raiseOverflowError when an argument of %c format is out of range.
- bpo-18111: The min() and max() functions now support a default argument tobe returned instead of raising a ValueError on an empty sequence.(Contributed by Julian Berman.)
- bpo-18137: Detect integer overflow on precision in float.__format__() andcomplex.__format__().
- bpo-18183: Fix various unicode operations on strings with large unicodecodepoints.
- bpo-18180: Fix ref leak in _PyImport_GetDynLoadWindows().
- bpo-18038: SyntaxError raised during compilation sources with illegalencoding now always contains an encoding name.
- bpo-17931: Resolve confusion on Windows between pids and process handles.
- Tweak the exception message when the magic number or size value in abytecode file is truncated.
- bpo-17932: Fix an integer overflow issue on Windows 64-bit in iterators:change the C type of seqiterobject.it_index from long to Py_ssize_t.
- bpo-18065: Don’t set __path__ to the package name for frozen packages.
- bpo-18088: When reloading a module, unconditionally reset all relevantattributes on the module (e.g. __name__, __loader__, __package__,__file__, __cached__).
- bpo-17937: Try harder to collect cyclic garbage at shutdown.
- bpo-12370: Prevent class bodies from interfering with the __class__closure.
- bpo-17644: Fix a crash in str.format when curly braces are used in squarebrackets.
- bpo-17237: Fix crash in the ASCII decoder on m68k.
- bpo-17927: Frame objects kept arguments alive if they had been copied intoa cell, even if the cell was cleared.
- bpo-1545463: At shutdown, defer finalization of codec modules so thatstderr remains usable.
- bpo-7330: Implement width and precision (ex: “%5.3s”) for the formatstring of PyUnicode_FromFormat() function, original patch written by YsjRay.
- bpo-1545463: Global variables caught in reference cycles are nowgarbage-collected at shutdown.
- bpo-17094: Clear stale thread states after fork(). Note that this is apotentially disruptive change since it may release some system resourceswhich would otherwise remain perpetually alive (e.g. database connectionskept in thread-local storage).
- bpo-17408: Avoid using an obsolete instance of the copyreg module when theinterpreter is shutdown and then started again.
- bpo-5845: Enable tab-completion in the interactive interpreter by default,thanks to a new sys.__interactivehook__.
- bpo-17115: Module initialization now includes setting __package__ and__loader__ attributes to None. (See also:bpo-17116)
- bpo-17853: Ensure locals of a class that shadow free variables always winover the closures.
- bpo-17863: In the interactive console, don’t loop forever if the encodingcan’t be fetched from stdin.
- bpo-17867: Raise an ImportError if __import__ is not found in__builtins__.
- bpo-18698: Ensure importlib.reload() returns the module out ofsys.modules.
- bpo-17857: Prevent build failures with pre-3.5.0 versions of sqlite3, suchas was shipped with Centos 5 and Mac OS X 10.4.
- bpo-17413: sys.settrace callbacks were being passed a string instead of anexception instance for the ‘value’ element of the arg tuple if theexception originated from C code; now an exception instance is alwaysprovided.
- bpo-17782: Fix undefined behaviour on platforms where
structtimespec’s “tv_nsec” member is not a C long. - bpo-17722: When looking up __round__, resolve descriptors.
- bpo-16061: Speed up str.replace() for replacing 1-character strings.
- bpo-17715: Fix segmentation fault from raising an exception in a __trunc__method.
- bpo-17643: Add __callback__ attribute to weakref.ref.
- bpo-16447: Fixed potential segmentation fault when setting __name__ on aclass.
- bpo-17669: Fix crash involving finalization of generators using yieldfrom.
- bpo-14439: Python now prints the traceback on runpy failure at startup.
- bpo-17469: Fix _Py_GetAllocatedBlocks() and sys.getallocatedblocks() whenrunning on valgrind.
- bpo-17619: Make input() check for Ctrl-C correctly on Windows.
- bpo-17357: Add missing verbosity messages for -v/-vv that were lost duringthe importlib transition.
- bpo-17610: Don’t rely on non-standard behavior of the C qsort() function.
- bpo-17323: The “[X refs, Y blocks]” printed by debug builds has beendisabled by default. It can be re-enabled with the
-Xshowrefcountoption. - bpo-17328: Fix possible refleak in dict.setdefault.
- bpo-17275: Corrected class name in init error messages of the C version ofBufferedWriter and BufferedRandom.
- bpo-7963: Fixed misleading error message that issued when object is calledwithout arguments.
- bpo-8745: Small speed up zipimport on Windows. Patch by Catalin Iacob.
- bpo-5308: Raise ValueError when marshalling too large object (a sequencewith size >= 2**31), instead of producing illegal marshal data.
- bpo-12983: Bytes literals with invalid
\xescape now raise aSyntaxError and a full traceback including line number. - bpo-16967: In function definition, evaluate positional defaults beforekeyword-only defaults.
- bpo-17173: Remove uses of locale-dependent C functions (isalpha() etc.) inthe interpreter.
- bpo-17137: When a Unicode string is resized, the internal wide characterstring (wstr) format is now cleared.
- bpo-17043: The unicode-internal decoder no longer read past the end ofinput buffer.
- bpo-17098: All modules now have __loader__ set even if they pre-exist thebootstrapping of importlib.
- bpo-16979: Fix error handling bugs in the unicode-escape-decode decoder.
- bpo-16772: The base argument to the int constructor no longer acceptsfloats, or other non-integer objects with an __int__ method. Objects withan __index__ method are now accepted.
- bpo-10156: In the interpreter’s initialization phase, unicode globals arenow initialized dynamically as needed.
- bpo-16980: Fix processing of escaped non-ascii bytes in theunicode-escape-decode decoder.
- bpo-16975: Fix error handling bug in the escape-decode bytes decoder.
- bpo-14850: Now a charmap decoder treats U+FFFE as “undefined mapping” inany mapping, not only in a string.
- bpo-16613: Addm argument to
collections.Chainmap.new_childto allowthe new child map to be specified explicitly. - bpo-16730: importlib.machinery.FileFinder now no longers raises anexception when trying to populate its cache and it finds out the directoryis unreadable or has turned into a file. Reported and diagnosed by DavidPritchard.
- bpo-16906: Fix a logic error that prevented most static strings from beingcleared.
- bpo-11461: Fix the incremental UTF-16 decoder. Original patch by AmauryForgeot d’Arc.
- bpo-16856: Fix a segmentation fault from calling repr() on a dict with akey whose repr raise an exception.
- bpo-16367: Fix FileIO.readall() on Windows for files larger than 2 GB.
- bpo-16761: Calling int() with base argument only now raises TypeError.
- bpo-16759: Support the full DWORD (unsigned long) range in Reg2Py whenretrieving a REG_DWORD value. This corrects functions likewinreg.QueryValueEx that may have been returning truncated values.
- bpo-14420: Support the full DWORD (unsigned long) range in Py2Reg whenpassed a REG_DWORD value. Fixes OverflowError in winreg.SetValueEx.
- bpo-11939: Set the st_dev attribute of stat_result to allow Windows totake advantage of the os.path.samefile/sameopenfile/samestatimplementations used by other platforms.
- bpo-16772: The int() constructor’s second argument (base) no longeraccepts non integer values. Consistent with the behavior in Python 2.
- bpo-14470: Remove w9xpopen support per PEP 11.
- bpo-9856: Replace deprecation warning with raising TypeError inobject.__format__. Patch by Florent Xicluna.
- bpo-16597: In buffered and text IO, call close() on the underlying streamif invoking flush() fails.
- bpo-16722: In the bytes() constructor, try to call __bytes__ on theargument before __index__.
- bpo-16421: loading multiple modules from one shared object is now handledcorrectly (previously, the first module loaded from that file was silentlyreturned). Patch by Václav Šmilauer.
- bpo-16602: When a weakref’s target was part of a long deallocation chain,the object could remain reachable through its weakref even though itsrefcount had dropped to zero.
- bpo-16495: Remove extraneous NULL encoding check from bytes_decode().
- bpo-16619: Create NameConstant AST class to represent None, True, andFalse literals. As a result, these constants are never loaded at runtimefrom builtins.
- bpo-16455: On FreeBSD and Solaris, if the locale is C, theASCII/surrogateescape codec is now used (instead of the locale encoding)to decode the command line arguments. This change fixes inconsistencieswith os.fsencode() and os.fsdecode(), because these operating systemsannounce an ASCII locale encoding, but actually use the ISO-8859-1encoding in practice.
- bpo-16562: Optimize dict equality testing. Patch by Serhiy Storchaka.
- bpo-16588: Silence unused-but-set warnings in Python/thread_pthread
- bpo-16592: stringlib_bytes_join doesn’t raise MemoryError on allocationfailure.
- bpo-16546: Fix: ast.YieldFrom argument is now mandatory.
- bpo-16514: Fix regression causing a traceback when sys.path[0] is None(actually, any non-string or non-bytes type).
- bpo-16306: Fix multiple error messages when unknown command lineparameters where passed to the interpreter. Patch by Hieu Nguyen.
- bpo-16215: Fix potential double memory free in str.replace(). Patch bySerhiy Storchaka.
- bpo-16290: A float return value from the __complex__ special method is nolonger accepted in the complex() constructor.
- bpo-16416: On Mac OS X, operating system data are now alwaysencoded/decoded to/from UTF-8/surrogateescape, instead of the localeencoding (which may be ASCII if no locale environment variable is set), toavoid inconsistencies with os.fsencode() and os.fsdecode() functions whichare already using UTF-8/surrogateescape.
- bpo-16453: Fix equality testing of dead weakref objects.
- bpo-9535: Fix pending signals that have been received but not yet handledby Python to not persist after os.fork() in the child process.
- bpo-14794: Fix slice.indices to return correct results for huge values,rather than raising OverflowError.
- bpo-15001: fix segfault on “del sys.modules[‘__main__’]”. Patch by VictorStinner.
- bpo-8271: the utf-8 decoder now outputs the correct number of U+FFFDcharacters when used with the ‘replace’ error handler on invalid utf-8sequences. Patch by Serhiy Storchaka, tests by Ezio Melotti.
- bpo-5765: Apply a hard recursion limit in the compiler instead of blowingthe stack and segfaulting. Initial patch by Andrea Griffini.
- bpo-16402: When slicing a range, fix shadowing of exceptions from__index__.
- bpo-16336: fix input checking in the surrogatepass error handler. Patch bySerhiy Storchaka.
- bpo-8401: assigning an int to a bytearray slice (e.g. b[3:4] = 5) nowraises an error.
- bpo-7317: Display full tracebacks when an error occurs asynchronously.Patch by Alon Horev with update by Alexey Kachayev.
- bpo-16309: Make PYTHONPATH=”” behavior the same as if PYTHONPATH not setat all.
- bpo-10189: Improve the error reporting of SyntaxErrors related to globaland nonlocal statements.
- Fix segfaults on setting __qualname__ on builtin types and attempting todelete it on any type.
- bpo-14625: Rewrite the UTF-32 decoder. It is now 3x to 4x faster. Patchwritten by Serhiy Storchaka.
- bpo-16345: Fix an infinite loop when
fromkeyson a dict subclassreceived a nonempty dict from the constructor. - bpo-16271: Fix strange bugs that resulted from __qualname__ appearing in aclass’s __dict__ and on type.
- bpo-12805: Make bytes.join and bytearray.join faster when the separator isempty. Patch by Serhiy Storchaka.
- bpo-6074: Ensure cached bytecode files can always be updated by the userthat created them, even when the source file is read-only.
- bpo-15958: bytes.join and bytearray.join now accept arbitrary bufferobjects.
- bpo-14783: Improve int() docstring and switch docstrings for str(),range(), and slice() to use multi-line signatures.
- bpo-16160: Subclass support now works for types.SimpleNamespace.
- bpo-16148: Implement PEP 424, adding operator.length_hint andPyObject_LengthHint.
- Upgrade Unicode data (UCD) to version 6.2.
- bpo-15379: Fix passing of non-BMP characters as integers for the charmapdecoder (already working as unicode strings). Patch by Serhiy Storchaka.
- bpo-15144: Fix possible integer overflow when handling pointers as integervalues, by using
Py_uintptr_tinstead ofsize_t. Patch by SerhiyStorchaka. - bpo-15965: Explicitly cast
AT_FDCWDas (int). Required on Solaris 10(which definesAT_FDCWDas0xffd19553), harmless on other platforms. - bpo-15839: Convert SystemErrors in
super()to RuntimeErrors. - bpo-15448: Buffered IO now frees the buffer when closed, instead of whendeallocating.
- bpo-15846: Fix SystemError which happened when using
ast.parse()in anexception handler on code with syntax errors. - bpo-15897: zipimport.c doesn’t check return value of fseek(). Patch byFelipe Cruz.
- bpo-15801: Make sure mappings passed to ‘%’ formatting are actuallysubscriptable.
- bpo-15111: __import__ should propagate ImportError when raised as aside-effect of a module triggered from using fromlist.
- bpo-15022: Add pickle and comparison support to types.SimpleNamespace.
Library¶
- bpo-4331: Added functools.partialmethod (Initial patch by Alon Horev)
- bpo-13461: Fix a crash in the TextIOWrapper.tell method on 64-bitplatforms. Patch by Yogesh Chaudhari.
- bpo-18681: Fix a NameError in importlib.reload() (noticed by Weizhao Li).
- bpo-14323: Expanded the number of digits in the coefficients for the RGB– YIQ conversions so that they match the FCC NTSC versions.
- bpo-17998: Fix an internal error in regular expression engine.
- bpo-17557: Fix os.getgroups() to work with the modified behavior ofgetgroups(2) on OS X 10.8. Original patch by Mateusz Lenik.
- bpo-18608: Avoid keeping a strong reference to the locale module insidethe _io module.
- bpo-18619: Fix atexit leaking callbacks registered from sub-interpreters,and make it GC-aware.
- bpo-15699: The readline module now uses PEP 3121-style moduleinitialization, so as to reclaim allocated resources (Python callbacks) atshutdown. Original patch by Robin Schreiber.
- bpo-17616: wave.open now supports the context management protocol.
- bpo-18599: Fix name attribute of _sha1.sha1() object. It now returns‘SHA1’ instead of ‘SHA’.
- bpo-13266: Added inspect.unwrap to easily unravel __wrapped__ chains(initial patch by Daniel Urban and Aaron Iles)
- bpo-18561: Skip name in ctypes’ _build_callargs() if name is NULL.
- bpo-18559: Fix NULL pointer dereference error in _pickle module
- bpo-18556: Check the return type of PyUnicode_AsWideChar() in ctype’sU_set().
- bpo-17818: aifc.getparams now returns a namedtuple.
- bpo-18549: Eliminate dead code in socket_ntohl()
- bpo-18530: Remove additional stat call from posixpath.ismount. Patch byAlex Gaynor.
- bpo-18514: Fix unreachable Py_DECREF() call in PyCData_FromBaseObj()
- bpo-9177: Calling read() or write() now raises ValueError, notAttributeError, on a closed SSL socket. Patch by Senko Rasic.
- bpo-18513: Fix behaviour of cmath.rect w.r.t. signed zeros on OS X 10.8 +gcc.
- bpo-18479: Changed venv Activate.ps1 to make deactivate a function, andremoved Deactivate.ps1.
- bpo-18480: Add missing call to PyType_Ready to the _elementtree extension.
- bpo-17778: Fix test discovery for test_multiprocessing. (Patch by ZacharyWare.)
- bpo-18393: The private module _gestalt and private functionsplatform._mac_ver_gestalt, platform._mac_ver_lookup and platform._bcd2strhave been removed. This does not affect the public interface of theplatform module.
- bpo-17482: functools.update_wrapper (and functools.wraps) now set the__wrapped__ attribute correctly even if the underlying function has a__wrapped__ attribute set.
- bpo-18431: The new email header parser now decodes RFC2047 encoded wordsin structured headers.
- bpo-18432: The sched module’s queue method was incorrectly returning aniterator instead of a list.
- bpo-18044: The new email header parser was mis-parsing encoded words wherean encoded character immediately followed the ‘?’ that follows the CTEcharacter, resulting in a decoding failure. They are now decodedcorrectly.
- bpo-18101: Tcl.split() now process strings nested in a tuple as it do withbyte strings.
- bpo-18116: getpass was always getting an error when testing /dev/tty, andthus was always falling back to stdin, and would then raise an exceptionif stdin could not be used (such as /dev/null). It also leaked an openfile. All of these issues are now fixed.
- bpo-17198: Fix a NameError in the dbm module. Patch by ValentinaMukhamedzhanova.
- bpo-18013: Fix cgi.FieldStorage to parse the W3C sample form.
- bpo-18020: improve html.escape speed by an order of magnitude. Patch byMatt Bryant.
- bpo-18347: ElementTree’s html serializer now preserves the case of closingtags.
- bpo-17261: Ensure multiprocessing’s proxies use proper address.
- bpo-18343: faulthandler.register() now keeps the previous signal handlerwhen the function is called twice, so faulthandler.unregister() restorescorrectly the original signal handler.
- bpo-17097: Make multiprocessing ignore EINTR.
- bpo-18339: Negative ints keys in unpickler.memo dict no longer cause asegfault inside the _pickle C extension.
- bpo-18240: The HMAC module is no longer restricted to bytes and acceptsany bytes-like object, e.g. memoryview. Original patch by Jonas Borgström.
- bpo-18224: Removed pydoc script from created venv, as it causes problemson Windows and adds no value over and above python -m pydoc …
- bpo-18155: The csv module now correctly handles csv files that use adelimiter character that has a special meaning in regexes, instead ofthrowing an exception.
- bpo-14360: encode_quopri can now be successfully used as an encoder whenconstructing a MIMEApplication object.
- bpo-11390: Add -o and -f command line options to the doctest CLI tospecify doctest options (and convert it to using argparse).
- bpo-18135: ssl.SSLSocket.write() now raises an OverflowError if the inputstring in longer than 2 gigabytes, and ssl.SSLContext.load_cert_chain()raises a ValueError if the password is longer than 2 gigabytes. The sslmodule does not support partial write.
- bpo-11016: Add C implementation of the stat module as _stat.
- bpo-18248: Fix libffi build on AIX.
- bpo-18259: Declare sethostname in socketmodule.c for AIX
- bpo-18147: Add diagnostic functions to ssl.SSLContext(). get_ca_list()lists all loaded CA certificates and cert_store_stats() returns amount ofloaded X.509 certs, X.509 CA certs and CRLs.
- bpo-18167: cgi.FieldStorage no longer fails to handle multipart/form-datawhen
\r\nappears at end of 65535 bytes without other newlines. - bpo-18076: Introduce importlib.util.decode_source().
- bpo-18357: add tests for dictview set difference. Patch by FraserTweedale.
- importlib.abc.SourceLoader.get_source() no longer changes SyntaxError orUnicodeDecodeError into ImportError.
- bpo-18058: Make the namespace package loader meet theimportlib.abc.InspectLoader ABC, allowing for namespace packages to workwith runpy. (See also:bpo-18057)
- bpo-17177: The imp module is pending deprecation.
- subprocess: Prevent a possible double close of parent pipe fds when thesubprocess exec runs into an error. Prevent a regular multi-close of the/dev/null fd when any of stdin, stdout and stderr was set to DEVNULL.
- bpo-18194: Introduce importlib.util.cache_from_source() andsource_from_cache() while documenting the equivalent functions in imp asdeprecated.
- bpo-17907: Document imp.new_module() as deprecated in favour oftypes.ModuleType.
- bpo-18192: Introduce importlib.util.MAGIC_NUMBER and document asdeprecated imp.get_magic().
- bpo-18149: Add filecmp.clear_cache() to manually clear the filecmp cache.Patch by Mark Levitt
- bpo-18193: Add importlib.reload().
- bpo-18157: Stop using imp.load_module() in pydoc.
- bpo-16102: Make uuid._netbios_getnode() work again on Python 3.
- bpo-17134: Add ssl.enum_cert_store() as interface to Windows’ cert store.
- bpo-18143: Implement ssl.get_default_verify_paths() in order to debug thedefault locations for cafile and capath.
- bpo-17314: Move multiprocessing.forking over to importlib.
- bpo-11959: SMTPServer and SMTPChannel now take an optional map, use ofwhich avoids affecting global state.
- bpo-18109: os.uname() now decodes fields from the locale encoding, andsocket.gethostname() now decodes the hostname from the locale encoding,instead of using the UTF-8 encoding in strict mode.
- bpo-18089: Implement importlib.abc.InspectLoader.load_module.
- bpo-18088: Introduce importlib.abc.Loader.init_module_attrs for settingmodule attributes. Leads to the pending deprecation ofimportlib.util.module_for_loader.
- bpo-17403: urllib.parse.robotparser normalizes the urls before adding toruleline. This helps in handling certain types invalid urls in aconservative manner. Patch contributed by Mher Movsisyan.
- bpo-18070: Have importlib.util.module_for_loader() set attributesunconditionally in order to properly support reloading.
- Added importlib.util.module_to_load to return a context manager to providethe proper module object to load.
- bpo-18025: Fixed a segfault in io.BufferedIOBase.readinto() when rawstream’s read() returns more bytes than requested.
- bpo-18011: As was originally intended, base64.b32decode() now raises abinascii.Error if there are non-b32-alphabet characters present in theinput string, instead of a TypeError.
- bpo-18072: Implement importlib.abc.InspectLoader.get_code() andimportlib.abc.ExecutionLoader.get_code().
- bpo-8240: Set the SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER flag on SSL sockets.
- bpo-17269: Workaround for socket.getaddrinfo crash on MacOS X with portNone or “0” and flags AI_NUMERICSERV.
- bpo-16986: ElementTree now correctly works with string input when theinternal XML encoding is not UTF-8 or US-ASCII.
- bpo-17996: socket module now exposes AF_LINK constant on BSD and OSX.
- bpo-17900: Allowed pickling of recursive OrderedDicts. Decreased pickledsize and pickling time.
- bpo-17914: Add os.cpu_count(). Patch by Yogesh Chaudhari, based on aninitial patch by Trent Nelson.
- bpo-17812: Fixed quadratic complexity of base64.b32encode(). Optimizebase64.b32encode() and base64.b32decode() (speed up to 3x).
- bpo-17980: Fix possible abuse of ssl.match_hostname() for denial ofservice using certificates with many wildcards (CVE-2013-2099).
- bpo-15758: Fix FileIO.readall() so it no longer has O(n**2) complexity.
- bpo-14596: The struct.Struct() objects now use a more compactimplementation.
- bpo-17981: logging’s SysLogHandler now closes the socket when it catchessocket OSErrors.
- bpo-17964: Fix os.sysconf(): the return type of the C sysconf() functionis long, not int.
- Fix typos in the multiprocessing module.
- bpo-17754: Make ctypes.util.find_library() independent of the locale.
- bpo-17968: Fix memory leak in os.listxattr().
- bpo-17606: Fixed support of encoded byte strings in the XMLGeneratorcharacters() and ignorableWhitespace() methods. Original patch bySebastian Ortiz Vasquez.
- bpo-17732: Ignore distutils.cfg options pertaining to install paths if avirtual environment is active.
- bpo-17915: Fix interoperability of xml.sax with file objects returned bycodecs.open().
- bpo-16601: Restarting iteration over tarfile really restarts rather thancontinuing from where it left off. Patch by Michael Birtwell.
- bpo-17289: The readline module now plays nicer with external modules orapplications changing the rl_completer_word_break_characters globalvariable. Initial patch by Bradley Froehle.
- bpo-12181: select module: Fix struct kevent definition on OpenBSD 64-bitplatforms. Patch by Federico Schwindt.
- bpo-11816: multiple improvements to the dis module: get_instructionsgenerator, ability to redirect output to a file, Bytecode and Instructionabstractions. Patch by Nick Coghlan, Ryan Kelly and Thomas Kluyver.
- bpo-13831: Embed stringification of remote traceback in local tracebackraised when pool task raises an exception.
- bpo-15528: Add weakref.finalize to support finalization using weakrefcallbacks.
- bpo-14173: Avoid crashing when reading a signal handler during interpretershutdown.
- bpo-15902: Fix imp.load_module() accepting None as a file when loading anextension module.
- bpo-13721: SSLSocket.getpeercert() and SSLSocket.do_handshake() now raisean OSError with ENOTCONN, instead of an AttributeError, when the SSLSocketis not connected.
- bpo-14679: add an __all__ (that contains only HTMLParser) to html.parser.
- bpo-17802: Fix an UnboundLocalError in html.parser. Initial tests byThomas Barlow.
- bpo-17358: Modules loaded by imp.load_source() and load_compiled() (and byextension load_module()) now have a better chance of working whenreloaded.
- bpo-17804: New function
struct.iter_unpackallows for streaming structunpacking. - bpo-17830: When keyword.py is used to update a keyword file, it nowpreserves the line endings of the original file.
- bpo-17272: Making the urllib.request’s Request.full_url a descriptor.Fixes bugs with assignment to full_url. Patch by Demian Brecht.
- bpo-17353: Plistlib emitted empty data tags with deeply nesteddatastructures
- bpo-11714: Use ‘with’ statements to assure a Semaphore releases acondition variable. Original patch by Thomas Rachel.
- bpo-16624:
subprocess.check_outputnow accepts aninputargument,allowing the subprocess’s stdin to be provided as a (byte) string. Patchby Zack Weinberg. - bpo-17795: Reverted backwards-incompatible change in SysLogHandler withUnix domain sockets.
- bpo-16694: Add a pure Python implementation of the operator module. Patchby Zachary Ware.
- bpo-11182: remove the unused and undocumented pydoc.Scanner class. Patchby Martin Morrison.
- bpo-17741: Add ElementTree.XMLPullParser, an event-driven parser fornon-blocking applications.
- bpo-17555: Fix ForkAwareThreadLock so that size of after fork registrydoes not grow exponentially with generation of process.
- bpo-17707: fix regression in multiprocessing.Queue’s get() method where itdid not block for short timeouts.
- bpo-17720: Fix the Python implementation of pickle.Unpickler to correctlyprocess the APPENDS opcode when it is used on non-list objects.
- bpo-17012: shutil.which() no longer falls back to the PATH environmentvariable if an empty path argument is specified. Patch by SerhiyStorchaka.
- bpo-17710: Fix pickle raising a SystemError on bogus input.
- bpo-17341: Include the invalid name in the error messages from re aboutinvalid group names.
- bpo-17702: os.environ now raises KeyError with the original environmentvariable name (str on UNIX), instead of using the encoded name (bytes onUNIX).
- bpo-16163: Make the importlib based version of pkgutil.iter_importers workfor submodules. Initial patch by Berker Peksag.
- bpo-16804: Fix a bug in the ‘site’ module that caused running ‘python -S-m site’ to incorrectly throw an exception.
- bpo-15480: Remove the deprecated and unused TYPE_INT64 code from marshal.Initial patch by Daniel Riti.
- bpo-2118: SMTPException is now a subclass of OSError.
- bpo-17016: Get rid of possible pointer wraparounds and integer overflowsin the re module. Patch by Nickolai Zeldovich.
- bpo-16658: add missing return to HTTPConnection.send(). Patch by JeffKnupp.
- bpo-9556: the logging package now allows specifying a time-of-day for aTimedRotatingFileHandler to rotate.
- bpo-14971: unittest test discovery no longer gets confused when a functionhas a different __name__ than its name in the TestCase class dictionary.
- bpo-17487: The wave getparams method now returns a namedtuple rather thana plain tuple.
- bpo-17675: socket repr() provides local and remote addresses (if any).Patch by Giampaolo Rodola’
- bpo-17093: Make the ABCs in importlib.abc provide default values or raisereasonable exceptions for their methods to make them more amenable tosuper() calls.
- bpo-17566: Make importlib.abc.Loader.module_repr() optional instead of anabstractmethod; now it raises NotImplementedError so as to be ignored bydefault.
- bpo-17678: Remove the use of deprecated method in http/cookiejar.py bychanging the call to get_origin_req_host() to origin_req_host.
- bpo-17666: Fix reading gzip files with an extra field.
- bpo-16475: Support object instancing, recursion and interned strings inmarshal
- bpo-17502: Process DEFAULT values in mock side_effect that returnsiterator.
- bpo-16795: On the ast.arguments object, unify vararg with varargannotationand kwarg and kwargannotation. Change the column offset of ast.Attributeto be at the attribute name.
- bpo-17434: Properly raise a SyntaxError when a string occurs betweenfuture imports.
- bpo-17117: Import and @importlib.util.set_loader now set __loader__ whenit has a value of None or the attribute doesn’t exist.
- bpo-17032: The “global” in the “NameError: global name ‘x’ is not defined”error message has been removed. Patch by Ram Rachum.
- bpo-18080: When building a C extension module on OS X, if the compiler isoverridden with the CC environment variable, use the new compiler as thedefault for linking if LDSHARED is not also overridden. This restoresDistutils behavior introduced in 3.2.3 and inadvertently dropped in 3.3.0.
- bpo-18113: Fixed a refcount leak in the curses.panel module’sset_userptr() method. Reported by Atsuo Ishimoto.
- Implement PEP 443 “Single-dispatch generic functions”.
- Implement PEP 435 “Adding an Enum type to the Python standard library”.
- bpo-15596: Faster pickling of unicode strings.
- bpo-17572: Avoid chained exceptions when passing bad directives totime.strptime(). Initial patch by Claudiu Popa.
- bpo-17435: threading.Timer’s __init__ method no longer uses mutabledefault values for the args and kwargs parameters.
- bpo-17526: fix an IndexError raised while passing code without filename toinspect.findsource(). Initial patch by Tyler Doyle.
- bpo-17540: Added style parameter to logging formatter configuration bydict.
- bpo-16692: The ssl module now supports TLS 1.1 and TLS 1.2. Initial patchby Michele Orrù.
- bpo-17025: multiprocessing: Reduce Queue and SimpleQueue contention.
- bpo-17536: Add to webbrowser’s browser list: www-browser, x-www-browser,iceweasel, iceape.
- bpo-17150: pprint now uses line continuations to wrap long stringliterals.
- bpo-17488: Change the subprocess.Popen bufsize parameter default valuefrom unbuffered (0) to buffering (-1) to match the behavior existing codeexpects and match the behavior of the subprocess module in Python 2 toavoid introducing hard to track down bugs.
- bpo-17521: Corrected non-enabling of logger following two calls tofileConfig().
- bpo-17508: Corrected logging MemoryHandler configuration in dictConfig()where the target handler wasn’t configured first.
- bpo-17209: curses.window.get_wch() now correctly handles KeyboardInterrupt(CTRL+c).
- bpo-5713: smtplib now handles 421 (closing connection) error codes whensending mail by closing the socket and reporting the 421 error code viathe exception appropriate to the command that received the error response.
- bpo-16997: unittest.TestCase now provides a subTest() context manager toprocedurally generate, in an easy way, small test instances.
- bpo-17485: Also delete the Request Content-Length header if the dataattribute is deleted. (Follow on to issuebpo-16464).
- bpo-15927: CVS now correctly parses escaped newlines and carriage whenparsing with quoting turned off.
- bpo-17467: add readline and readlines support to mock_open inunittest.mock.
- bpo-13248: removed deprecated and undocumented difflib.isbjunk,isbpopular.
- bpo-17192: Update the ctypes module’s libffi to v3.0.13. Thisspecifically addresses a stack misalignment issue on x86 and issues onsome more recent platforms.
- bpo-8862: Fixed curses cleanup when getkey is interrupted by a signal.
- bpo-17443: imaplib.IMAP4_stream was using the default unbuffered IO insubprocess, but the imap code assumes buffered IO. In Python2 this workedby accident. IMAP4_stream now explicitly uses buffered IO.
- bpo-17476: Fixed regression relative to Python2 in undocumented pydoc‘allmethods’; it was missing unbound methods on the class.
- bpo-17474: Remove the deprecated methods of Request class.
- bpo-16709: unittest discover order is no-longer filesystem specific. Patchby Jeff Ramnani.
- Use the HTTPS PyPI url for upload, overriding any plain HTTP URL inpypirc.
- bpo-5024: sndhdr.whichhdr now returns the frame count for WAV files ratherthan -1.
- bpo-17460: Remove the strict argument of HTTPConnection and removing theDeprecationWarning being issued from 3.2 onwards.
- bpo-16880: Do not assume _imp.load_dynamic() is defined in the imp module.
- bpo-16389: Fixed a performance regression relative to Python 3.1 in thecaching of compiled regular expressions.
- Added missing FeedParser and BytesFeedParser to email.parser.__all__.
- bpo-17431: Fix missing import of BytesFeedParser in email.parser.
- bpo-12921: http.server’s send_error takes an explain argument to send moreinformation in response. Patch contributed by Karl.
- bpo-17414: Add timeit, repeat, and default_timer to timeit.__all__.
- bpo-1285086: Get rid of the refcounting hack and speed upurllib.parse.unquote() and urllib.parse.unquote_to_bytes().
- bpo-17099: Have importlib.find_loader() raise ValueError when __loader__is not set, harmonizing with what happens when the attribute is set toNone.
- Expose the O_PATH constant in the os module if it is available.
- bpo-17368: Fix an off-by-one error in the Python JSON decoder that causeda failure while decoding empty object literals when object_pairs_hook wasspecified.
- bpo-17385: Fix quadratic behavior in threading.Condition. The FIFO queuenow uses a deque instead of a list.
- bpo-15806: Add contextlib.ignore(). This creates a context manager toignore specified exceptions, replacing the “except SomeException: pass”idiom.
- bpo-14645: The email generator classes now produce output using thespecified linesep throughout. Previously if the prolog, epilog, or bodywere stored with a different linesep, that linesep was used. This fixcorrects an RFC non- compliance issue with smtplib.send_message.
- bpo-17278: Fix a crash in heapq.heappush() and heapq.heappop() when thelist is being resized concurrently.
- bpo-16962: Use getdents64 instead of the obsolete getdents syscall in thesubprocess module on Linux.
- bpo-16935: unittest now counts the module as skipped if it raisesSkipTest, instead of counting it as an error. Patch by Zachary Ware.
- bpo-17018: Make Process.join() retry if os.waitpid() fails with EINTR.
- bpo-17223: array module: Fix a crasher when converting an array containinginvalid characters (outside range [U+0000; U+10ffff]) to Unicode:repr(array), str(array) and array.tounicode(). Patch written by ManuelJacob.
- bpo-17197: profile/cProfile modules refactored so that code of run() andrunctx() utility functions is not duplicated in both modules.
- bpo-14720: sqlite3: Convert datetime microseconds correctly. Patch by LoweThiderman.
- bpo-15132: Allow a list for the defaultTest argument ofunittest.TestProgram. Patch by Jyrki Pulliainen.
- bpo-17225: JSON decoder now counts columns in the first line starting with1, as in other lines.
- bpo-6623: Added explicit DeprecationWarning for ftplib.netrc, which hasbeen deprecated and undocumented for a long time.
- bpo-13700: Fix byte/string handling in imaplib authentication when anauthobject is specified.
- bpo-13153: Tkinter functions now raise TclError instead of ValueError whena string argument contains non-BMP character.
- bpo-9669: Protect re against infinite loops on zero-width matching innon-greedy repeat. Patch by Matthew Barnett.
- bpo-13169: The maximal repetition number in a regular expression has beenincreased from 65534 to 2147483647 (on 32-bit platform) or 4294967294 (on64-bit).
- bpo-17143: Fix a missing import in the trace module. Initial patch byBerker Peksag.
- bpo-15220: email.feedparser’s line splitting algorithm is now simpler andfaster.
- bpo-16743: Fix mmap overflow check on 32 bit Windows.
- bpo-16996: webbrowser module now uses shutil.which() to find a web-browseron the executable search path.
- bpo-16800: tempfile.gettempdir() no longer left temporary files when thedisk is full. Original patch by Amir Szekely.
- bpo-17192: Import libffi-3.0.12.
- bpo-16564: Fixed regression relative to Python2 in the operation ofemail.encoders.encode_7or8bit when used with binary data.
- bpo-17052: unittest discovery should use self.testLoader.
- bpo-4591: Uid and gid values larger than 2**31 are supported now.
- bpo-17141: random.vonmisesvariate() no longer hangs for large kappas.
- bpo-17149: Fix random.vonmisesvariate to always return results in [0,2*math.pi].
- bpo-1470548: XMLGenerator now works with binary output streams.
- bpo-6975: os.path.realpath() now correctly resolves multiple nestedsymlinks on POSIX platforms.
- bpo-13773: sqlite3.connect() gets a new
uriparameter to pass thefilename as a URI, allowing custom options to be passed. - bpo-16564: Fixed regression relative to Python2 in the operation ofemail.encoders.encode_noop when used with binary data.
- bpo-10355: The mode, name, encoding and newlines properties now work onSpooledTemporaryFile objects even when they have not yet rolled over.Obsolete method xreadline (which has never worked in Python 3) has beenremoved.
- bpo-16686: Fixed a lot of bugs in audioop module. Fixed crashes inavgpp(), maxpp() and ratecv(). Fixed an integer overflow in add(),bias(), and ratecv(). reverse(), lin2lin() and ratecv() no more loseprecision for 32-bit samples. max() and rms() no more returns a negativeresult and various other functions now work correctly with 32-bit sample-0x80000000.
- bpo-17073: Fix some integer overflows in sqlite3 module.
- bpo-16723: httplib.HTTPResponse no longer marked closed when theconnection is automatically closed.
- bpo-15359: Add CAN_BCM protocol support to the socket module. Patch byBrian Thorne.
- bpo-16948: Fix quoted printable body encoding for non-latin1 charactersets in the email package.
- bpo-16811: Fix folding of headers with no value in the provisional emailpolicies.
- bpo-17132: Update symbol for “yield from” grammar changes.
- bpo-17076: Make copying of xattrs more tolerant of missing FS support.Patch by Thomas Wouters.
- bpo-17089: Expat parser now correctly works with string input when theinternal XML encoding is not UTF-8 or US-ASCII. It also now accepts bytesand strings larger than 2 GiB.
- bpo-6083: Fix multiple segmentation faults occurred when PyArg_ParseTupleparses nested mutating sequence.
- bpo-5289: Fix ctypes.util.find_library on Solaris.
- bpo-17106: Fix a segmentation fault in io.TextIOWrapper when an underlyingstream or a decoder produces data of an unexpected type (i.e. whenio.TextIOWrapper initialized with text stream or use bytes-to-bytescodec).
- bpo-17015: When it has a spec, a Mock object now inspects its signaturewhen matching calls, so that arguments can be matched positionally or byname.
- bpo-15633: httplib.HTTPResponse is now mark closed when the server sendsless than the advertised Content-Length.
- bpo-12268: The io module file object write methods no longer abort earlywhen one of its write system calls is interrupted (EINTR).
- bpo-6972: The zipfile module no longer overwrites files outside of itsdestination path when extracting malicious zip files.
- bpo-4844: ZipFile now raises BadZipFile when opens a ZIP file with anincomplete “End of Central Directory” record. Original patch by GuilhermePolo and Alan McIntyre.
- bpo-17071: Signature.bind() now works when one of the keyword arguments isnamed
self. - bpo-12004: Fix an internal error in PyZipFile when writing an invalidPython file. Patch by Ben Morgan.
- Have py_compile use importlib as much as possible to avoid codeduplication. Code now raises FileExistsError if the file path to be usedfor the byte- compiled file is a symlink or non-regular file as a warningthat import will not keep the file path type if it writes to that path.
- bpo-16972: Have site.addpackage() consider already known paths even whennone are explicitly passed in. Bug report and fix by Kirill.
- bpo-1602133: on Mac OS X a shared library build (
--enable-shared) nowfills theos.environvariable correctly. - bpo-15505:
unittest.installHandlerno longer assumes SIGINT handler isset to a callable object. - bpo-13454: Fix a crash when deleting an iterator created byitertools.tee() if all other iterators were very advanced before.
- bpo-12411: Fix to cgi.parse_multipart to correctly use bytes boundariesand bytes data. Patch by Jonas Wagner.
- bpo-16957: shutil.which() no longer searches a bare file name in thecurrent directory on Unix and no longer searches a relative file path witha directory part in PATH directories. Patch by Thomas Kluyver.
- bpo-1159051: GzipFile now raises EOFError when reading a corrupted filewith truncated header or footer.
- bpo-16993: shutil.which() now preserves the case of the path and extensionon Windows.
- bpo-16992: On Windows in signal.set_wakeup_fd, validate the filedescriptor argument.
- bpo-16422: For compatibility with the Python version, the C version ofdecimal now uses strings instead of integers for rounding mode constants.
- bpo-15861: tkinter now correctly works with lists and tuples containingstrings with whitespaces, backslashes or unbalanced braces.
- bpo-9720: zipfile now writes correct local headers for files larger than 4GiB.
- bpo-16955: Fix the poll() method for multiprocessing’s socket connectionson Windows.
- SSLContext.load_dh_params() now properly closes the input file.
- bpo-15031: Refactor some .pyc management code to cut down on codeduplication. Thanks to Ronan Lamy for the report and taking an initialstab at the problem.
- bpo-16398: Optimize deque.rotate() so that it only moves pointers anddoesn’t touch the underlying data with increfs and decrefs.
- bpo-16900: Issue a ResourceWarning when an ssl socket is left unclosed.
- bpo-13899:
\A,\Z, and\Bnow correctly match the A, Z, and Bliterals when used inside character classes (e.g.'[\A]'). Patch byMatthew Barnett. - bpo-15545: Fix regression in sqlite3’s iterdump method where it wasfailing if the connection used a row factory (such as sqlite3.Row) thatproduced unsortable objects. (Regression was introduced by fix for 9750).
- fcntl: add F_DUPFD_CLOEXEC constant, available on Linux 2.6.24+.
- bpo-15972: Fix error messages when os functions expecting a file name orfile descriptor receive the incorrect type.
- bpo-8109: The ssl module now has support for server-side SNI, thanks to a
SSLContext.set_servername_callback()method. Patch by Daniel Black. - bpo-16860: In tempfile, use O_CLOEXEC when available to set theclose-on-exec flag atomically.
- bpo-16674: random.getrandbits() is now 20-40% faster for small integers.
- bpo-16009: JSON error messages now provide more information.
- bpo-16828: Fix error incorrectly raised by bz2.compress(b’’) andbz2.BZ2Compressor.compress(b’’). Initial patch by Martin Packman.
- bpo-16833: In http.client.HTTPConnection, do not concatenate the requestheaders and body when the payload exceeds 16 KB, since it can consume morememory for no benefit. Patch by Benno Leslie.
- bpo-16541: tk_setPalette() now works with keyword arguments.
- bpo-16820: In configparser,
parser.popitem()no longer raisesValueError. This makesparser.clean()work correctly. - bpo-16820: In configparser,
parser['section']={}now preservessection order within the parser. This makesparser.update()preservesection order as well. - bpo-16820: In configparser,
parser['DEFAULT']={}now correctlyclears previous values stored in the default section. Same goes forparser.update({'DEFAULT':{}}). - bpo-9586: Redefine SEM_FAILED on MacOSX to keep compiler happy.
- bpo-16787: Increase asyncore and asynchat default output buffers size, todecrease CPU usage and increase throughput.
- bpo-10527: make multiprocessing use poll() instead of select() ifavailable.
- bpo-16688: Now regexes contained backreferences correctly work withnon-ASCII strings. Patch by Matthew Barnett.
- bpo-16486: Make aifc files act as context managers.
- bpo-16485: Now file descriptors are closed if file header patching failedon closing an aifc file.
- bpo-16640: Run less code under a lock in sched module.
- bpo-16165: sched.scheduler.run() no longer blocks a scheduler for otherthreads.
- bpo-16641: Default values of sched.scheduler.enter() are no longermodifiable.
- bpo-16618: Make glob.glob match consistently across strings and bytesregarding leading dots. Patch by Serhiy Storchaka.
- bpo-16788: Add samestat to Lib/ntpath.py
- bpo-16713: Parsing of ‘tel’ urls using urlparse separates params frompath.
- bpo-16443: Add docstrings to regular expression match objects. Patch byAnton Kasyanov.
- bpo-15701: Fix HTTPError info method call to return the headersinformation.
- bpo-16752: Add a missing import to modulefinder. Patch by Berker Peksag.
- bpo-16646: ftplib.FTP.makeport() might lose socket error details. (patchby Serhiy Storchaka)
- bpo-16626: Fix infinite recursion in glob.glob() on Windows when thepattern contains a wildcard in the drive or UNC path. Patch by SerhiyStorchaka.
- bpo-15783: Except for the number methods, the C version of decimal nowsupports all None default values present in decimal.py. These values werelargely undocumented.
- bpo-11175: argparse.FileType now accepts encoding and errors arguments.Patch by Lucas Maystre.
- bpo-16488: epoll() objects now support the
withstatement. Patch bySerhiy Storchaka. - bpo-16298: In HTTPResponse.read(), close the socket when there is noContent-Length and the incoming stream is finished. Patch by EranRundstein.
- bpo-16049: Add abc.ABC class to enable the use of inheritance to createABCs, rather than the more cumbersome metaclass=ABCMeta. Patch by BrunoDupuis.
- Expose the TCP_FASTOPEN and MSG_FASTOPEN flags in socket when they’reavailable.
- bpo-15701: Add a .headers attribute to urllib.error.HTTPError. Patchcontributed by Berker Peksag.
- bpo-15872: Fix 3.3 regression introduced by the new fd-based shutil.rmtreethat caused it to not ignore certain errors when ignore_errors was set.Patch by Alessandro Moura and Serhiy Storchaka.
- bpo-16248: Disable code execution from the user’s home directory bytkinter when the -E flag is passed to Python. Patch by Zachary Ware.
- bpo-13390: New function
sys.getallocatedblocks()returns thenumber of memory blocks currently allocated. - bpo-16628: Fix a memory leak in ctypes.resize().
- bpo-13614: Fix setup.py register failure with invalid rst in description.Patch by Julien Courteau and Pierre Paul Lefebvre.
- bpo-13512: Create ~/.pypirc securely (CVE-2011-4944). Initial patch byPhilip Jenvey, tested by Mageia and Debian.
- bpo-7719: Make distutils ignore
.nfs*files instead of choking lateron. Initial patch by SilentGhost and Jeff Ramnani. - bpo-13120: Allow calling pdb.set_trace() from thread. Patch by IlyaSandler.
- bpo-16585: Make CJK encoders support error handlers that return bytes perPEP 383.
- bpo-10182: The re module doesn’t truncate indices to 32 bits anymore.Patch by Serhiy Storchaka.
- bpo-16333: use (“,”, “: “) as default separator in json when indent isspecified, to avoid trailing whitespace. Patch by Serhiy Storchaka.
- bpo-16573: In 2to3, treat enumerate() like a consuming call, sosuperfluous list() calls aren’t added to filter(), map(), and zip() whichare directly passed enumerate().
- bpo-16464: Reset the Content-Length header when a urllib Request is reusedwith new data.
- bpo-12848: The pure Python pickle implementation now treats object lengthsas unsigned 32-bit integers, like the C implementation does. Patch bySerhiy Storchaka.
- bpo-16423: urllib.request now has support for
data:URLs. Patch byMathias Panzenböck. - bpo-4473: Add a POP3.stls() to switch a clear-text POP3 session into anencrypted POP3 session, on supported servers. Patch by Lorenzo Catucci.
- bpo-4473: Add a POP3.capa() method to query the capabilities advertised bythe POP3 server. Patch by Lorenzo Catucci.
- bpo-4473: Ensure the socket is shutdown cleanly in POP3.close(). Patch byLorenzo Catucci.
- bpo-16522: added FAIL_FAST flag to doctest.
- bpo-15627: Add the importlib.abc.InspectLoader.source_to_code() method.
- bpo-16408: Fix file descriptors not being closed in error conditions inthe zipfile module. Patch by Serhiy Storchaka.
- bpo-14631: Add a new
weakref.WeakMethodto simulate weakreferences to bound methods. - bpo-16469: Fix exceptions from float -> Fraction and Decimal -> Fractionconversions for special values to be consistent with those for float ->int and Decimal -> int. Patch by Alexey Kachayev.
- bpo-16481: multiprocessing no longer leaks process handles on Windows.
- bpo-12428: Add a pure Python implementation of functools.partial(). Patchby Brian Thorne.
- bpo-16140: The subprocess module no longer double closes its childsubprocess.PIPE parent file descriptors on child error prior to exec().
- Remove a bare print to stdout from the subprocess module that could havehappened if the child process wrote garbage to its pre-exec error pipe.
- The subprocess module now raises its own SubprocessError instead of aRuntimeError in various error situations which should not normally happen.
- bpo-16327: The subprocess module no longer leaks file descriptors used forstdin/stdout/stderr pipes to the child when fork() fails.
- bpo-14396: Handle the odd rare case of waitpid returning 0 when notexpected in subprocess.Popen.wait().
- bpo-16411: Fix a bug where zlib.decompressobj().flush() might try toaccess previously- freed memory. Patch by Serhiy Storchaka.
- bpo-16357: fix calling accept() on a SSLSocket created throughSSLContext.wrap_socket(). Original patch by Jeff McNeil.
- bpo-16409: The reporthook callback made by the legacyurllib.request.urlretrieve API now properly supplies a constant non-zeroblock_size as it did in Python 3.2 and 2.7. This matches the behavior ofurllib.request.URLopener.retrieve.
- bpo-16431: Use the type information when constructing a Decimal subtypefrom a Decimal argument.
- bpo-15641: Clean up deprecated classes from importlib. Patch by TarasLyapun.
- bpo-16350: zlib.decompressobj().decompress() now accumulates data fromsuccessive calls after EOF in unused_data, instead of only saving theargument to the last call. decompressobj().flush() now correctly setsunused_data and unconsumed_tail. A bug in the handling of MemoryError whensetting the unconsumed_tail attribute has also been fixed. Patch by SerhiyStorchaka.
- bpo-12759: sre_parse now raises a proper error when the name of the groupis missing. Initial patch by Serhiy Storchaka.
- bpo-16152: fix tokenize to ignore whitespace at the end of the code whenno newline is found. Patch by Ned Batchelder.
- bpo-16284: Prevent keeping unnecessary references to worker functions inconcurrent.futures ThreadPoolExecutor.
- bpo-16230: Fix a crash in select.select() when one of the lists changessize while iterated on. Patch by Serhiy Storchaka.
- bpo-16228: Fix a crash in the json module where a list changes size whileit is being encoded. Patch by Serhiy Storchaka.
- bpo-16351: New function gc.get_stats() returns per-generation collectionstatistics.
- bpo-14897: Enhance error messages of struct.pack and struct.pack_into.Patch by Matti Mäki.
- bpo-16316: mimetypes now recognizes the .xz and .txz (.tar.xz) extensions.Patch by Serhiy Storchaka.
- bpo-12890: cgitb no longer prints spurious <p> tags in text mode when thelogdir option is specified.
- bpo-16307: Fix multiprocessing.Pool.map_async not calling its callbacks.Patch by Janne Karila.
- bpo-16305: Fix a segmentation fault occurring when interruptingmath.factorial.
- bpo-16116: Fix include and library paths to be correct when building Cextensions in venvs.
- bpo-16245: Fix the value of a few entities in html.entities.html5.
- bpo-16301: Fix the localhost verification in urllib/request.py for
file://urls. - bpo-16250: Fix the invocations of URLError which had misplaced filenameattribute for exception.
- bpo-10836: Fix exception raised when file not found in urlretrieve Initialpatch by Ezio Melotti.
- bpo-14398: Fix size truncation and overflow bugs in the bz2 module.
- bpo-12692: Fix resource leak in urllib.request when talking to an HTTPserver that does not include a
Connection:closeheader in itsresponses. - bpo-12034: Fix bogus caching of result in check_GetFinalPathNameByHandle.Patch by Atsuo Ishimoto.
- Improve performance of
lzma.LZMAFile(see alsobpo-16034). - bpo-16220: wsgiref now always calls close() on an iterable response. Patchby Brent Tubbs.
- bpo-16270: urllib may hang when used for retrieving files via FTP by usinga context manager. Patch by Giampaolo Rodola’.
- bpo-16461: Wave library should be able to deal with 4GB wav files, andsample rate of 44100 Hz.
- bpo-16176: Properly identify Windows 8 via platform.platform()
- bpo-16088: BaseHTTPRequestHandler’s send_error method includes aContent-Length header in its response now. Patch by Antoine Pitrou.
- bpo-16114: The subprocess module no longer provides a misleading errormessage stating that args[0] did not exist when either the cwd orexecutable keyword arguments specified a path that did not exist.
- bpo-16169: Fix ctypes.WinError()’s confusion between errno and winerror.
- bpo-16110: logging.fileConfig now accepts a pre-initialised ConfigParserinstance.
- bpo-1492704: shutil.copyfile() raises a distinct SameFileError now ifsource and destination are the same file. Patch by Atsuo Ishimoto.
- bpo-13896: Make shelf instances work with ‘with’ as context managers.Original patch by Filip Gruszczyński.
- bpo-15417: Add support for csh and fish in venv activation scripts.
- bpo-14377: ElementTree.write and some of the module-level functions have anew parameter -short_empty_elements. It controls how elements with nocontents are emitted.
- bpo-16089: Allow ElementTree.TreeBuilder to work again with a non-Elementelement_factory (fixes a regression in SimpleTAL).
- bpo-9650: List commonly used format codes in time.strftime andtime.strptime docsttings. Original patch by Mike Hoy.
- bpo-15452: logging configuration socket listener now has a verify optionthat allows an application to apply a verification function to thereceived configuration data before it is acted upon.
- bpo-16034: Fix performance regressions in the new
bz2.BZ2Fileimplementation. Initial patch by Serhiy Storchaka. pty.spawn()now returns the child process status returned byos.waitpid().- bpo-15756:
subprocess.poll()now properly handleserrno.ECHILDtoreturn a returncode of 0 when the child has already exited or cannot bewaited on. - bpo-15323: Improve failure message of
Mock.assert_called_once_with(). - bpo-16064:
unittest-mclaims executable is “python”, not “python3”. - bpo-12376: Pass on parameters in
TextTestResult.__init__()super call. - bpo-15222: Insert blank line after each message in mbox mailboxes.
- bpo-16013: Fix
csv.Readerparsing issue with ending quote characters.Patch by Serhiy Storchaka. - bpo-15421: Fix an OverflowError in
Calendar.itermonthdates()afterdatetime.MAXYEAR. Patch by Cédric Krier. - bpo-16112: platform.architecture does not correctly escape argument to/usr/bin/file. Patch by David Benjamin.
- bpo-15970:
xml.etree.ElementTreenow serializes correctly the empty HTMLelements ‘meta’ and ‘param’. - bpo-15842: The
SocketIO.{readable,writable,seekable}methods now raiseValueError when the file-like object is closed. Patch by AlessandroMoura. - bpo-15876: Fix a refleak in the
cursesmodule: window.encoding. - bpo-15881: Fix
atexithook inmultiprocessing. Original patch byChris McDonough. - bpo-15841: The readable(), writable() and seekable() methods of
io.BytesIOandio.StringIOobjects now raise ValueError when theobject has been closed. Patch by Alessandro Moura. - bpo-15447: Use
subprocess.DEVNULLin webbrowser, instead of openingos.devnullexplicitly and leaving it open. - bpo-15509:
webbrowser.UnixBrowserno longer passes empty arguments toPopen when%actionsubstitutions produce empty strings. - bpo-12776: Call
argparsetype function (specified by add_argument) onlyonce. Before, the type function was called twice in the case where thedefault was specified and the argument was given as well. This wasespecially problematic for the FileType type, as a default file wouldalways be opened, even if a file argument was specified on the commandline. (See also:bpo-11839) - bpo-15906: Fix a regression in argparse caused by the preceding change,when
action='append',type='str'anddefault=[]. - bpo-16113: Added sha3 module based on the Keccak reference implementation3.2. The
hashlibmodule has four additional hash algorithms:sha3_224,sha3_256,sha3_384andsha3_512. As part of the patch some commoncode was moved from _hashopenssl.c to hashlib.h. - ctypes.call_commethod was removed, since its only usage was in the defunctsamples directory.
- bpo-16692: Added TLSv1.1 and TLSv1.2 support for the ssl modules.
- bpo-16832: add abc.get_cache_token() to expose cache validity checkingsupport in ABCMeta.
IDLE¶
- bpo-18429: Format / Format Paragraph, now works when comment blocks areselected. As with text blocks, this works best when the selection onlyincludes complete lines.
- bpo-18226: Add docstrings and unittests for FormatParagraph.py. Originalpatches by Todd Rovito and Phil Webster.
- bpo-18279: Format - Strip trailing whitespace no longer marks a file aschanged when it has not been changed. This fix followed the addition of atest file originally written by Phil Webster (the issue’s main goal).
- bpo-7136: In the Idle File menu, “New Window” is renamed “New File”. Patchby Tal Einat, Roget Serwy, and Todd Rovito.
- Remove dead imports of imp.
- bpo-18196: Avoid displaying spurious SystemExit tracebacks.
- bpo-5492: Avoid traceback when exiting IDLE caused by a race condition.
- bpo-17511: Keep IDLE find dialog open after clicking “Find Next”. Originalpatch by Sarah K.
- bpo-18055: Move IDLE off of imp and on to importlib.
- bpo-15392: Create a unittest framework for IDLE. Initial patch byRajagopalasarma Jayakrishnan. See Lib/idlelib/idle_test/README.txt for howto run Idle tests.
- bpo-14146: Highlight source line while debugging on Windows.
- bpo-17838: Allow sys.stdin to be reassigned.
- bpo-13495: Avoid loading the color delegator twice in IDLE.
- bpo-17798: Allow IDLE to edit new files when specified on command line.
- bpo-14735: Update IDLE docs to omit “Control-z on Windows”.
- bpo-17532: Always include Options menu for IDLE on OS X. Patch byGuilherme Simões.
- bpo-17585: Fixed IDLE regression. Now closes when using exit() or quit().
- bpo-17657: Show full Tk version in IDLE’s about dialog. Patch by ToddRovito.
- bpo-17613: Prevent traceback when removing syntax colorizer in IDLE.
- bpo-1207589: Backwards-compatibility patch for right-click menu in IDLE.
- bpo-16887: IDLE now accepts Cancel in tabify/untabify dialog box.
- bpo-17625: In IDLE, close the replace dialog after it is used.
- bpo-14254: IDLE now handles readline correctly across shell restarts.
- bpo-17614: IDLE no longer raises exception when quickly closing a file.
- bpo-6698: IDLE now opens just an editor window when configured to do so.
- bpo-8900: Using keyboard shortcuts in IDLE to open a file no longer raisesan exception.
- bpo-6649: Fixed missing exit status in IDLE. Patch by Guilherme Polo.
- bpo-17114: IDLE now uses non-strict config parser.
- bpo-9290: In IDLE the sys.std* streams now implement io.TextIOBaseinterface and support all mandatory methods and properties.
- bpo-5066: Update IDLE docs. Patch by Todd Rovito.
- bpo-16829: IDLE printing no longer fails if there are spaces or otherspecial characters in the file path.
- bpo-16491: IDLE now prints chained exception tracebacks.
- bpo-16819: IDLE method completion now correctly works for bytes literals.
- bpo-16504: IDLE now catches SyntaxErrors raised by tokenizer. Patch byRoger Serwy.
- bpo-16511: Use default IDLE width and height if config param is not valid.Patch Serhiy Storchaka.
- bpo-1207589: Add Cut/Copy/Paste items to IDLE right click Context Menu.Patch by Todd Rovito.
- bpo-16123: IDLE - deprecate running without a subprocess. Patch by RogerSerwy.
Tests¶
- bpo-1666318: Add a test that shutil.copytree() retains directorypermissions. Patch by Catherine Devlin.
- bpo-18273: move the tests in Lib/test/json_tests to Lib/test/test_json andmake them discoverable by unittest. Patch by Zachary Ware.
- Fix a fcntl test case on KFreeBSD, Debian #708653 (Petr Salinger).
- bpo-18396: Fix spurious test failure in test_signal on Windows whenfaulthandler is enabled (Patch by Jeremy Kloth)
- bpo-17046: Fix broken test_executable_without_cwd in test_subprocess.
- bpo-15415: Add new temp_dir() and change_cwd() context managers totest.support, and refactor temp_cwd() to use them. Patch by ChrisJerdonek.
- bpo-15494: test.support is now a package rather than a module (Initialpatch by Indra Talip)
- bpo-17944: test_zipfile now discoverable and uses subclassing to generatetests for different compression types. Fixed a bug with skipping sometests due to use of exhausted iterators.
- bpo-18266: test_largefile now works with unittest test discovery andsupports running only selected tests. Patch by Zachary Ware.
- bpo-17767: test_locale now works with unittest test discovery. Originalpatch by Zachary Ware.
- bpo-18375: Assume –randomize when –randseed is used for running thetestsuite.
- bpo-11185: Fix test_wait4 under AIX. Patch by Sébastien Sablé.
- bpo-18207: Fix test_ssl for some versions of OpenSSL that ignore secondsin ASN1_TIME fields.
- bpo-18094: test_uuid no longer reports skipped tests as passed.
- bpo-17992: Add timeouts to asyncore and asynchat tests so that they won’taccidentally hang.
- bpo-17833: Fix test_gdb failures seen on machines where debug symbols forglibc are available (seen on PPC64 Linux).
- bpo-7855: Add tests for ctypes/winreg for issues found in IronPython.Initial patch by Dino Viehland.
- bpo-11078: test___all__ now checks for duplicates in __all__. Initialpatch by R. David Murray.
- bpo-17712: Fix test_gdb failures on Ubuntu 13.04.
- bpo-17835: Fix test_io when the default OS pipe buffer size is larger thanone million bytes.
- bpo-17065: Use process-unique key for winreg tests to avoid failures iftest is run multiple times in parallel (eg: on a buildbot host).
- bpo-12820: add tests for the xml.dom.minicompat module. Patch by JohnChandler and Phil Connell.
- bpo-17691: test_univnewlines now works with unittest test discovery. Patchby Zachary Ware.
- bpo-17790: test_set now works with unittest test discovery. Patch byZachary Ware.
- bpo-17789: test_random now works with unittest test discovery. Patch byZachary Ware.
- bpo-17779: test_osx_env now works with unittest test discovery. Patch byZachary Ware.
- bpo-17766: test_iterlen now works with unittest test discovery. Patch byZachary Ware.
- bpo-17690: test_time now works with unittest test discovery. Patch byZachary Ware.
- bpo-17692: test_sqlite now works with unittest test discovery. Patch byZachary Ware.
- bpo-11995: test_pydoc doesn’t import all sys.path modules anymore.
- bpo-17448: test_sax now skips if there are no xml parsers availableinstead of raising an ImportError.
- bpo-11420: make test suite pass with -B/DONTWRITEBYTECODE set. Initialpatch by Thomas Wouters.
- bpo-10652: make tcl/tk tests run after __all__ test, patch by ZacharyWare.
- bpo-11963: remove human verification from test_parser and test_subprocess.
- bpo-11732: add a new suppress_crash_popup() context manager totest.support that disables crash popups on Windows and use it intest_faulthandler and test_capi.
- bpo-13898: test_ssl no longer prints a spurious stack trace on Ubuntu.
- bpo-17283: Share code between
__main__.pyandregrtest.pyinLib/test. - bpo-17249: convert a test in test_capi to use unittest and reap threads.
- bpo-17107: Test client-side SNI support in urllib.request thanks to thenew server-side SNI support in the ssl module. Initial patch by DanielBlack.
- bpo-17041: Fix testing when Python is configured with the–without-doc-strings.
- bpo-16923: Fix ResourceWarnings in test_ssl.
- bpo-15539: Added regression tests for Tools/scripts/pindent.py.
- bpo-17479: test_io now works with unittest test discovery. Patch byZachary Ware.
- bpo-17066: test_robotparser now works with unittest test discovery. Patchby Zachary Ware.
- bpo-17334: test_index now works with unittest test discovery. Patch byZachary Ware.
- bpo-17333: test_imaplib now works with unittest test discovery. Patch byZachary Ware.
- bpo-17082: test_dbm* now work with unittest test discovery. Patch byZachary Ware.
- bpo-17079: test_ctypes now works with unittest test discovery. Patch byZachary Ware.
- bpo-17304: test_hash now works with unittest test discovery. Patch byZachary Ware.
- bpo-17303: test_future* now work with unittest test discovery. Patch byZachary Ware.
- bpo-17163: test_file now works with unittest test discovery. Patch byZachary Ware.
- bpo-16925: test_configparser now works with unittest test discovery. Patchby Zachary Ware.
- bpo-16918: test_codecs now works with unittest test discovery. Patch byZachary Ware.
- bpo-16919: test_crypt now works with unittest test discovery. Patch byZachary Ware.
- bpo-16910: test_bytes, test_unicode, and test_userstring now work withunittest test discovery. Patch by Zachary Ware.
- bpo-16905: test_warnings now works with unittest test discovery. Initialpatch by Berker Peksag.
- bpo-16898: test_bufio now works with unittest test discovery. Patch byZachary Ware.
- bpo-16888: test_array now works with unittest test discovery. Patch byZachary Ware.
- bpo-16896: test_asyncore now works with unittest test discovery. Patch byZachary Ware.
- bpo-16897: test_bisect now works with unittest test discovery. Initialpatch by Zachary Ware.
- bpo-16852: test_genericpath, test_posixpath, test_ntpath, and test_macpathnow work with unittest test discovery. Patch by Zachary Ware.
- bpo-16748: test_heapq now works with unittest test discovery.
- bpo-10646: Tests rearranged for os.samefile/samestat to check for not justsymlinks but also hard links.
- bpo-15302: Switch regrtest from using getopt to using argparse.
- bpo-15324: Fix regrtest parsing of –fromfile, –match, and –randomizeoptions.
- bpo-16702: test_urllib2_localnet tests now correctly ignores proxies forlocalhost tests.
- bpo-16664: Add regression tests for glob’s behaviour concerning entriesstarting with a “.”. Patch by Sebastian Kreft.
- bpo-13390: The
-Roption to regrtest now also checks for memoryallocation leaks, usingsys.getallocatedblocks(). - bpo-16559: Add more tests for the json module, including some from theofficial test suite at json.org. Patch by Serhiy Storchaka.
- bpo-16661: Fix the
os.getgrouplist()test by not assuming that it givesthe same output asid -G. - bpo-16115: Add some tests for the executable argument tosubprocess.Popen(). Initial patch by Kushal Das.
- bpo-16126: PyErr_Format format mismatch in _testcapimodule.c. Patch bySerhiy Storchaka.
- bpo-15304: Fix warning message when
os.chdir()fails insidetest.support.temp_cwd(). Patch by Chris Jerdonek. - bpo-15802: Fix test logic in
TestMaildir.test_create_tmp(). Patch bySerhiy Storchaka. - bpo-15557: Added a test suite for the webbrowser module, thanks to AntonBarkovsky.
- bpo-16698: Skip posix test_getgroups when built with OS X deploymenttarget prior to 10.6.
Build¶
- bpo-16067: Add description into MSI file to replace installer’s temporaryname.
- bpo-18257: Fix readlink usage in python-config. Install the pythonversion again on Darwin.
- bpo-18481: Add C coverage reporting with gcov and lcov. A new make target“coverage- report” creates an instrumented Python build, runs unit testsand creates a HTML. The report can be updated with “make coverage-lcov”.
- bpo-17845: Clarified the message printed when some module are not built.
- bpo-18256: Compilation fix for recent AIX releases. Patch by DavidEdelsohn.
- bpo-17547: In configure, explicitly pass -Wformat for the benefit for GCC4.8.
- bpo-15172: Document NASM 2.10+ as requirement for building OpenSSL 1.0.1on Windows.
- bpo-17591: Use lowercase filenames when including Windows header files.Patch by Roumen Petrov.
- bpo-17550: Fix the –enable-profiling configure switch.
- bpo-17425: Build with openssl 1.0.1d on Windows.
- bpo-16754: Fix the incorrect shared library extension on linux. Introducetwo makefile macros SHLIB_SUFFIX and EXT_SUFFIX. SO now has the value ofSHLIB_SUFFIX again (as in 2.x and 3.1). The SO macro is removed in 3.4.
- bpo-5033: Fix building of the sqlite3 extension module when the SQLitelibrary version has “beta” in it. Patch by Andreas Pelme.
- bpo-17228: Fix building without pymalloc.
- bpo-3718: Use AC_ARG_VAR to set MACHDEP in configure.ac.
- bpo-16235: Implement python-config as a shell script.
- bpo-16769: Remove outdated Visual Studio projects.
- bpo-17031: Fix running regen in cross builds.
- bpo-3754: fix typo in pthread AC_CACHE_VAL.
- bpo-15484: Fix _PYTHON_PROJECT_BASE for srcdir != builddir builds; use_PYTHON_PROJECT_BASE in distutils/sysconfig.py.
- Drop support for Windows 2000 (changeset e52df05b496a).
- bpo-17029: Let h2py search the multiarch system include directory.
- bpo-16953: Fix socket module compilation on platforms withHAVE_BROKEN_POLL. Patch by Jeffrey Armstrong.
- bpo-16320: Remove redundant Makefile dependencies for strings and bytes.
- Cross compiling needs host and build settings. configure no longer createsa broken PYTHON_FOR_BUILD variable when –build is missing.
- Fix cross compiling issue in setup.py, ensure that lib_dirs and inc_dirsare defined in cross compiling mode, too.
- bpo-16836: Enable IPv6 support even if IPv6 is disabled on the build host.
- bpo-16593: Have BSD ‘make -s’ do the right thing, thanks to Daniel Shahaf
- bpo-16262: fix out-of-src-tree builds, if mercurial is not installed.
- bpo-15298: ensure _sysconfigdata is generated in build directory, notsource directory.
- bpo-15833: Fix a regression in 3.3 that resulted in exceptions beingraised if importlib failed to write byte-compiled files. This affectedattempts to build Python out-of-tree from a read-only source directory.
- bpo-15923: Fix a mistake in
asdl_c.pythat resulted in a TypeErrorafter 2801bf875a24 (see #15801). - bpo-16135: Remove OS/2 support.
- bpo-15819: Make sure we can build Python out-of-tree from a read-onlysource directory. (Somewhat related tobpo-9860.)
- bpo-15587: Enable Tk high-resolution text rendering on Macs with Retinadisplays. Applies to Tkinter apps, such as IDLE, on OS X framework buildslinked with Cocoa Tk 8.5.
- bpo-17161: make install now also installs a python3 man page.
C API¶
- bpo-18351: Fix various issues in a function in importlib provided to helpPyImport_ExecCodeModuleWithPathnames() (and thus by extensionPyImport_ExecCodeModule() and PyImport_ExecCodeModuleEx()).
- bpo-9369: The types of
char*arguments of PyObject_CallFunction() andPyObject_CallMethod() now changed toconstchar*. Based on patches byJörg Müller and Lars Buitinck. - bpo-17206: Py_CLEAR(), Py_DECREF(), Py_XINCREF() and Py_XDECREF() nowexpand their arguments once instead of multiple times. Patch written byIllia Polosukhin.
- bpo-17522: Add the PyGILState_Check() API.
- bpo-17327: Add PyDict_SetDefault.
- bpo-16881: Fix Py_ARRAY_LENGTH macro for GCC < 3.1.
- bpo-16505: Remove unused Py_TPFLAGS_INT_SUBCLASS.
- bpo-16086: PyTypeObject.tp_flags and PyType_Spec.flags are now unsigned(unsigned long and unsigned int) to avoid an undefined behaviour withPy_TPFLAGS_TYPE_SUBCLASS ((1 << 31). PyType_GetFlags() result type is nowunsigned too (unsigned long, instead of long).
- bpo-16166: Add PY_LITTLE_ENDIAN and PY_BIG_ENDIAN macros and unifiedendianness detection and handling.
Documentation¶
- bpo-23006: Improve the documentation and indexing of dict.__missing__. Addan entry in the language datamodel special methods section. Revise andindex its discussion in the stdtypes mapping/dict section.
- bpo-17701: Improving strftime documentation.
- bpo-18440: Clarify that
hash()can truncate the value returned from anobject’s custom__hash__()method. - bpo-17844: Add links to encoders and decoders for bytes-to-bytes codecs.
- bpo-14097: improve the “introduction” page of the tutorial.
- bpo-17977: The documentation for the cadefault argument’s default value inurllib.request.urlopen() is fixed to match the code.
- bpo-6696: add documentation for the Profile objects, and improveprofile/cProfile docs. Patch by Tom Pinckney.
- bpo-15940: Specify effect of locale on time functions.
- bpo-17538: Document XML vulnerabilties
- bpo-16642: sched.scheduler timefunc initial default is time.monotonic.Patch by Ramchandra Apte
- bpo-17047: remove doubled words in docs and docstrings reported by SerhiyStorchaka and Matthew Barnett.
- bpo-15465: Document the versioning macros in the C API docs rather thanthe standard library docs. Patch by Kushal Das.
- bpo-16406: Combine the pages for uploading and registering to PyPI.
- bpo-16403: Document how distutils uses the maintainer field in PKG-INFO.Patch by Jyrki Pulliainen.
- bpo-16695: Document how glob handles filenames starting with a dot.Initial patch by Jyrki Pulliainen.
- bpo-8890: Stop advertising an insecure practice by replacing uses of the/tmp directory with better alternatives in the documentation. Patch byGeoff Wilson.
- bpo-17203: add long option names to unittest discovery docs.
- bpo-13094: add “Why do lambdas defined in a loop with different values allreturn the same result?” programming FAQ.
- bpo-14901: Update portions of the Windows FAQ. Patch by Ashish NitinPatil.
- bpo-16267: Better document the 3.3+ approach to combining @abstractmethodwith @staticmethod, @classmethod and @property
- bpo-15209: Clarify exception chaining description in exceptions moduledocumentation
- bpo-15990: Improve argument/parameter documentation.
- bpo-16209: Move the documentation for the str built-in function to a newstr class entry in the “Text Sequence Type” section.
- bpo-13538: Improve str() and object.__str__() documentation.
- bpo-16489: Make it clearer that importlib.find_loader() needs parentpackages to be explicitly imported.
- bpo-16400: Update the description of which versions of a given packagePyPI displays.
- bpo-15677: Document that zlib and gzip accept a compression level of 0 tomean ‘no compression’. Patch by Brian Brazil.
- bpo-16197: Update winreg docstrings and documentation to match code. Patchby Zachary Ware.
- bpo-8040: added a version switcher to the documentation. Patch by YurySelivanov.
- bpo-16241: Document -X faulthandler command line option. Patch by MarekŠuppa.
- Additional comments and some style changes in the concurrent.futures URLretrieval example
- bpo-16115: Improve subprocess.Popen() documentation around args, shell,and executable arguments.
- bpo-13498: Clarify docs of os.makedirs()’s exist_ok argument. Done withgreat native- speaker help from R. David Murray.
- bpo-15533: Clarify docs and add tests for
subprocess.Popen()’s cwdargument. - bpo-15979: Improve timeit documentation.
- bpo-16036: Improve documentation of built-in
int()’s signature andarguments. - bpo-15935: Clarification of
argparsedocs, re: add_argument() type anddefault arguments. Patch contributed by Chris Jerdonek. - bpo-11964: Document a change in v3.2 to the behavior of the indentparameter of json encoding operations.
- bpo-15116: Remove references to appscript as it is no longer beingsupported.
Tools/Demos¶
- bpo-18817: Fix a resource warning in Lib/aifc.py demo. Patch by VajraskyKok.
- bpo-18439: Make patchcheck work on Windows for ACKS, NEWS.
- bpo-18448: Fix a typo in Tools/demo/eiffel.py.
- bpo-18457: Fixed saving of formulas and complex numbers inTools/demo/ss1.py.
- bpo-18449: Make Tools/demo/ss1.py work again on Python 3. Patch by FévryThibault.
- bpo-12990: The “Python Launcher” on OSX could not launch python scriptsthat have paths that include wide characters.
- bpo-15239: Make mkstringprep.py work again on Python 3.
- bpo-17028: Allowed Python arguments to be supplied to the Windowslauncher.
- bpo-17156: pygettext.py now detects the encoding of source files andcorrectly writes and escapes non-ascii characters.
- bpo-15539: Fix a number of bugs in Tools/scripts/pindent.py. Nowpindent.py works with a “with” statement. pindent.py no longer producesimproper indentation. pindent.py now works with continued lines brokenafter “class” or “def” keywords and with continuations at the start ofline.
- bpo-11797: Add a 2to3 fixer that maps reload() to imp.reload().
- bpo-10966: Remove the concept of unexpected skipped tests.
- bpo-9893: Removed the Misc/Vim directory.
- Removed the Misc/TextMate directory.
- bpo-16245: Add the Tools/scripts/parse_html5_entities.py script to parsethe list of HTML5 entities and update the html.entities.html5 dictionary.
- bpo-15378: Fix Tools/unicode/comparecodecs.py. Patch by Serhiy Storchaka.
- bpo-16549: Make json.tool work again on Python 3 and add tests. Initialpatch by Berker Peksag and Serhiy Storchaka.
- bpo-13301: use ast.literal_eval() instead of eval() inTools/i18n/msgfmt.py. Patch by Serhiy Storchaka.