Release date: 2017-09-05
Release date: 11-Oct-2014
Release date: 02-Mar-2014
Release date: 23-Feb-2014
Release date: 09-Feb-2014
Release date: 26-Jan-2014
Release date: 11-Nov-2013
Release date: 27-Oct-2013
Release date: 13-May-2013
Release date: 07-Apr-2013
Release date: 24-Mar-2013
Release date: 29-Sep-2012
Release date: 23-Sep-2012
Release date: 09-Sep-2012
Release date: 25-Aug-2012
Release date: 12-Aug-2012
Release date: 27-Jun-2012
Release date: 31-May-2012
Release date: 01-May-2012
Release date: 01-Apr-2012
Release date: 05-Mar-2012
bpo-14172: Fix reference leak when marshalling a buffer-like object (otherthan a bytes object).
bpo-13521: dict.setdefault() now does only one lookup for the given key,making it “atomic” for many purposes. Patch by Filip Gruszczyński.
PEP 409,Issue #6210: “raise X from None” is now supported as a means ofsuppressing the display of the chained exception context. The chainedcontext still remains available as the __context__ attribute.
bpo-10181: New memoryview implementation fixes multiple ownership andlifetime issues of dynamically allocated Py_buffer members (#9990) as wellas crashes (#8305, #7433). Many new features have been added (Seewhatsnew/3.3), and the documentation has been updated extensively. Thendarray test object from _testbuffer.c implements all aspects of PEP-3118,so further development towards the complete implementation of the PEP canproceed in a test-driven manner.
Thanks to Nick Coghlan, Antoine Pitrou and Pauli Virtanen for review andmany ideas.
bpo-12834: Fix incorrect results of memoryview.tobytes() for non-contiguous arrays.
bpo-5231: Introduce memoryview.cast() method that allows changing formatand shape without making a copy of the underlying memory.
bpo-14084: Fix a file descriptor leak when importing a module with a badencoding.
Upgrade Unicode data to Unicode 6.1.
bpo-14040: Remove rarely used file name suffixes for C extensions (underPOSIX mainly).
bpo-14051: Allow arbitrary attributes to be set of classmethod andstaticmethod.
bpo-13703: oCERT-2011-003: Randomize hashes of str and bytes to protectagainst denial of service attacks due to hash collisions within the dictand set types. Patch by David Malcolm, based on work by Victor Stinner.
bpo-13020: Fix a reference leak when allocating a structsequence objectfails. Patch by Suman Saha.
bpo-13908: Ready types returned from PyType_FromSpec.
bpo-11235: Fix OverflowError when trying to import a source file whosemodification time doesn’t fit in a 32-bit timestamp.
bpo-12705: A SyntaxError exception is now raised when attempting tocompile multiple statements as a single interactive statement.
Fix the builtin module initialization code to store the init function forfuture reinitialization.
bpo-8052: The posix subprocess module would take a long time closing allpossible file descriptors in the child process rather than just open filedescriptors. It now closes only the open fds if possible for the defaultclose_fds=True behavior.
bpo-13629: Renumber the tokens in token.h so that they match the indexesinto _PyParser_TokenNames.
bpo-13752: Add a casefold() method to str.
bpo-13761: Add a “flush” keyword argument to the print() function, used toensure flushing the output stream.
bpo-13645: pyc files now contain the size of the corresponding sourcecode, to avoid timestamp collisions (especially on filesystems with a lowtimestamp resolution) when checking for freshness of the bytecode.
PEP 380,Issue #11682: Add “yield from <x>” to support easy delegation tosubgenerators (initial patch by Greg Ewing, integration into 3.3 by RenaudBlanch, Ryan Kelly, Zbigniew Jędrzejewski-Szmek and Nick Coghlan)
bpo-13748: Raw bytes literals can now be written with therb prefix aswell asbr.
bpo-12736: Use full unicode case mappings for upper, lower, and titlecase.
bpo-12760: Add a create mode to open(). Patch by David Townshend.
bpo-13738: Simplify implementation of bytes.lower() and bytes.upper().
bpo-13577: Built-in methods and functions now have a __qualname__. Patchby sbt.
bpo-6695: Full garbage collection runs now clear the freelist of setobjects. Initial patch by Matthias Troffaes.
Fix OSError.__init__ and OSError.__new__ so that each of them can beoverriden and take additional arguments (followup toissue #12555).
Fix the fix forissue #12149: it was incorrect, although it had the sideeffect of appearing to resolve the issue. Thanks to Mark Shannon fornoticing.
bpo-13505: Pickle bytes objects in a way that is compatible with Python 2when using protocols <= 2.
bpo-11147: Fix an unused argument in _Py_ANNOTATE_MEMORY_ORDER. (Fixgiven by Campbell Barton).
bpo-13503: Use a more efficient reduction format for bytearrays withpickle protocol >= 3. The old reduction format is kept with olderprotocols in order to allow unpickling under Python 2. Patch by Irmen deJong.
bpo-7111: Python can now be run without a stdin, stdout or stderr stream.It was already the case with Python 2. However, the corresponding sysmodule entries are now set to None (instead of an unusable file object).
bpo-11849: Ensure that free()d memory arenas are really released on POSIXsystems supporting anonymous memory mappings. Patch by Charles-FrançoisNatali.
PEP 3155 /issue #13448: Qualified name for classes and functions.
bpo-13436: Fix a bogus error message when an AST object was passed aninvalid integer value.
bpo-13411: memoryview objects are now hashable when the underlying objectis hashable.
bpo-13338: Handle all enumerations in _Py_ANNOTATE_MEMORY_ORDER to allowcompiling extension modules with -Wswitch-enum on gcc. Initial patch byFloris Bruynooghe.
bpo-10227: Add an allocation cache for a single slice object. Patch byStefan Behnel.
bpo-13393: BufferedReader.read1() now asks the full requested size to theraw stream instead of limiting itself to the buffer size.
bpo-13392: Writing a pyc file should now be atomic under Windows as well.
bpo-13333: The UTF-7 decoder now accepts lone surrogates (the encoderalready accepts them).
bpo-13389: Full garbage collection passes now clear the freelists for listand dict objects. They already cleared other freelists in theinterpreter.
bpo-13327: Remove the need for an explicit None as the second argument toos.utime, os.lutimes, os.futimes, os.futimens, os.futimesat, in order toupdate to the current time. Also added keyword argument handling toos.utimensat in order to remove the need for explicit None.
bpo-13350: Simplify some C code by replacing most usages ofPyUnicode_Format by PyUnicode_FromFormat.
bpo-13342: input() used to ignore sys.stdin’s and sys.stdout’s unicodeerror handler in interactive mode (when calling into PyOS_Readline()).
bpo-9896: Add start, stop, and step attributes to range objects.
bpo-13343: Fix a SystemError when a lambda expression uses a globalvariable in the default value of a keyword-only argument:lambda*,arg=GLOBAL_NAME:None
bpo-12797: Added custom opener parameter to builtin open() andFileIO.open().
bpo-10519: Avoid unnecessary recursive function calls in setobject.c.
bpo-10363: Deallocate global locks in Py_Finalize().
bpo-13018: Fix reference leaks in error paths in dictobject.c. Patch bySuman Saha.
bpo-13201: Define ‘==’ and ‘!=’ to compare range objects based on thesequence of values they define (instead of comparing based on objectidentity).
bpo-1294232: In a few cases involving metaclass inheritance, theinterpreter would sometimes invoke the wrong metaclass when building a newclass object. These cases now behave correctly. Patch by Daniel Urban.
bpo-12753: Add support for Unicode name aliases and named sequences. Bothunicodedata.lookup() and ‘N{...}’ now resolve aliases, andunicodedata.lookup() resolves named sequences too.
bpo-12170: The count(), find(), rfind(), index() and rindex() methods ofbytes and bytearray objects now accept an integer between 0 and 255 astheir first argument. Patch by Petri Lehtinen.
bpo-12604: VTRACE macro expanded to no-op in _sre.c to avoid compilerwarnings. Patch by Josh Triplett and Petri Lehtinen.
bpo-12281: Rewrite the MBCS codec to handle correctly replace and ignoreerror handlers on all Windows versions. The MBCS codec is now supportingall error handlers, instead of only replace to encode and ignore todecode.
bpo-13188: When called without an explicit traceback argument,generator.throw() now gets the traceback from the passed exception’s__traceback__ attribute. Patch by Petri Lehtinen.
bpo-13146: Writing a pyc file is now atomic under POSIX.
bpo-7833: Extension modules built using distutils on Windows will nolonger include a “manifest” to prevent them failing at import time in someembedded situations.
PEP 3151 /issue #12555: reworking the OS and IO exception hierarchy.
Add internal API for static strings (_Py_identifier et al.).
bpo-13063: the Windows error ERROR_NO_DATA (numbered 232 and described as“The pipe is being closed”) is now mapped to POSIX errno EPIPE (previouslyEINVAL).
bpo-12911: Fix memory consumption when calculating the repr() of hugetuples or lists.
PEP 393: flexible string representation. Thanks to Torsten Becker for theinitial implementation, and Victor Stinner for various bug fixes.
bpo-14081: The ‘sep’ and ‘maxsplit’ parameter to str.split, bytes.split,and bytearray.split may now be passed as keyword arguments.
bpo-13012: The ‘keepends’ parameter to str.splitlines may now be passed asa keyword argument: “my_string.splitlines(keepends=True)”. The samechange also applies to bytes.splitlines and bytearray.splitlines.
bpo-7732: Don’t open a directory as a file anymore while importing amodule. Ignore the direcotry if its name matchs the module name (e.g.“__init__.py”) and raise a ImportError instead.
bpo-13021: Missing decref on an error path. Thanks to Suman Saha forfinding the bug and providing a patch.
bpo-12973: Fix overflow checks that relied on undefined behaviour inlist_repeat (listobject.c) and islice_next (itertoolsmodule.c). Thesebugs caused test failures with recent versions of Clang.
bpo-12904: os.utime, os.futimes, os.lutimes, and os.futimesat now writeatime and mtime with nanosecond precision on modern POSIX platforms.
bpo-12802: the Windows error ERROR_DIRECTORY (numbered 267) is now mappedto POSIX errno ENOTDIR (previously EINVAL).
bpo-9200: The str.is* methods now work with strings that contain non-BMPcharacters even in narrow Unicode builds.
bpo-12791: Break reference cycles early when a generator exits with anexception.
bpo-12773: Make __doc__ mutable on user-defined classes.
bpo-12766: Raise a ValueError when creating a class with a class variablethat conflicts with a name in __slots__.
bpo-12266: Fix str.capitalize() to correctly uppercase/lowercasetitlecased and cased non-letter characters.
bpo-12732: In narrow unicode builds, allow Unicode identifiers which falloutside the BMP.
bpo-12575: Validate user-generated AST before it is compiled.
Make type(None), type(Ellipsis), and type(NotImplemented) callable. Theyreturn the respective singleton instances.
Forbid summing bytes with sum().
Verify the types of AST strings and identifiers provided by the userbefore compiling them.
bpo-12647: The None object now has a __bool__() method that returns False.Formerly, bool(None) returned False only because of special case logic inPyObject_IsTrue().
bpo-12579: str.format_map() now raises a ValueError if used on a formatstring that contains positional fields. Initial patch by Julian Berman.
bpo-10271: Allow warnings.showwarning() be any callable.
bpo-11627: Fix segfault when __new__ on a exception returns a non-exception class.
bpo-12149: Update the method cache after a type’s dictionary gets clearedby the garbage collector. This fixes a segfault when an instance and itstype get caught in a reference cycle, and the instance’s deallocator callsone of the methods on the type (e.g. when subclassing IOBase). Diagnosisand patch by Davide Rizzo.
bpo-9611: FileIO.read() clamps the length to INT_MAX on Windows. (Seealso: bpo-9015)
bpo-9642: Uniformize the tests on the availability of the mbcs codec, adda new HAVE_MBCS define.
bpo-9642: Fix filesystem encoding initialization: use the ANSI code pageon Windows if the mbcs codec is not available, and fail with a fatal errorif we cannot get the locale encoding (if nl_langinfo(CODESET) is notavailable) instead of using UTF-8.
When a generator yields, do not retain the caller’s exception state on thegenerator.
bpo-12475: Prevent generators from leaking their exception state into thecaller’s frame as they return for the last time.
bpo-12291: You can now load multiple marshalled objects from a stream,with other data interleaved between marshalled objects.
bpo-12356: When required positional or keyword-only arguments are notgiven, produce a informative error message which includes the name(s) ofthe missing arguments.
bpo-12370: Fix super with no arguments when __class__ is overriden in theclass body.
bpo-12084: os.stat on Windows now works properly with relative symboliclinks when called from any directory.
Loosen type restrictions on the __dir__ method. __dir__ can now return anysequence, which will be converted to a list and sorted by dir().
bpo-12265: Make error messages produced by passing an invalid set ofarguments to a function more informative.
bpo-12225: Still allow Python to build if Python is not in its hg repo ormercurial is not installed.
bpo-1195: my_fgets() now always clears errors before calling fgets(). Fixthe following case: sys.stdin.read() stopped with CTRL+d (end of file),raw_input() interrupted by CTRL+c.
bpo-12216: Allow unexpected EOF errors to happen on any line of the file.
bpo-12199: The TryExcept and TryFinally and AST nodes have been unifiedinto a Try node.
bpo-9670: Increase the default stack size for secondary threads on Mac OSX and FreeBSD to reduce the chances of a crash instead of a “maximumrecursion depth” RuntimeError exception. (patch by Ronald Oussoren)
bpo-12106: The use of the multiple-with shorthand syntax is now reflectedin the AST.
bpo-12190: Try to use the same filename object when compilingunmarshalling a code objects in the same file.
bpo-12166: Move implementations of dir() specialized for various typesinto the __dir__() methods of those types.
bpo-5715: In socketserver, close the server socket in the child process.
Correct lookup of __dir__ on objects. Among other things, this causeserrors besides AttributeError found on lookup to be propagated.
bpo-12060: Use sig_atomic_t type and volatile keyword in the signalmodule. Patch written by Charles-François Natali.
bpo-1746656: Added the if_nameindex, if_indextoname, if_nametoindexmethods to the socket module.
bpo-12044: Fixed subprocess.Popen when used as a context manager to waitfor the process to end when exiting the context to avoid unintentionallyleaving zombie processes around.
bpo-1195: Fix input() if it is interrupted by CTRL+d and then CTRL+c,clear the end- of-file indicator after CTRL+d.
bpo-1856: Avoid crashes and lockups when daemon threads run while theinterpreter is shutting down; instead, these threads are now killed whenthey try to take the GIL.
bpo-9756: When calling a method descriptor or a slot wrapper descriptor,the check of the object type doesn’t read the __class__ attribute anymore.Fix a crash if a class override its __class__ attribute (e.g. a proxy ofthe str type). Patch written by Andreas Stührk.
bpo-10517: After fork(), reinitialize the TLS used by the PyGILState_*APIs, to avoid a crash with the pthread implementation in RHEL 5. Patchby Charles-François Natali.
bpo-10914: Initialize correctly the filesystem codec when creating a newsubinterpreter to fix a bootstrap issue with codecs implemented in Python,as the ISO-8859-15 codec.
bpo-11918: OS/2 and VMS are no more supported because of the lack ofmaintainer.
bpo-6780: fix starts/endswith error message to mention that tuples areaccepted too.
bpo-5057: fix a bug in the peepholer that led to non-portable pyc filesbetween narrow and wide builds while optimizing BINARY_SUBSCR on non-BMPchars (e.g. “U00012345”[0]).
bpo-11845: Fix typo in rangeobject.c that caused a crash incompute_slice_indices. Patch by Daniel Urban.
bpo-5673: Added atimeout keyword argument to subprocess.Popen.wait,subprocess.Popen.communicated, subprocess.call, subprocess.check_call, andsubprocess.check_output. If the blocking operation takes more thantimeout seconds, thesubprocess.TimeoutExpired exception is raised.
bpo-11650: PyOS_StdioReadline() retries fgets() if it was interrupted(EINTR), for example if the program is stopped with CTRL+z on Mac OS X.Patch written by Charles-Francois Natali.
bpo-9319: Include the filename in “Non-UTF8 code ...” syntax error.
bpo-10785: Store the filename as Unicode in the Python parser.
bpo-11619: _PyImport_LoadDynamicModule() doesn’t encode the path to byteson Windows.
bpo-10998: Remove mentions of -Q, sys.flags.division_warning andPy_DivisionWarningFlag left over from Python 2.
bpo-11244: Remove an unnecessary peepholer check that was preventingnegative zeros from being constant-folded properly.
bpo-11395: io.FileIO().write() clamps the data length to 32,767 bytes onWindows if the file is a TTY to workaround a Windows bug. The Windowsconsole returns an error (12: not enough space error) on writing intostdout if stdout mode is binary and the length is greater than 66,000bytes (or less, depending on heap usage).
bpo-11320: fix bogus memory management in Modules/getpath.c, leading to apossible crash when calling Py_SetPath().
bpo-11432: A bug was introduced in subprocess.Popen on posix systems with3.2.0 where the stdout or stderr file descriptor being the same as thestdin file descriptor would raise an exception. webbrowser.open wouldfail. fixed.
bpo-9856: Change object.__format__ with a non-empty format string to be aDeprecationWarning. In 3.2 it was a PendingDeprecationWarning. In 3.4 itwill be a TypeError.
bpo-11244: The peephole optimizer is now able to constant-fold arbitrarilycomplex expressions. This also fixes a 3.2 regression where operationsinvolving negative numbers were not constant-folded.
bpo-11450: Don’t truncate hg version info in Py_GetBuildInfo() when thereare many tags (e.g. when using mq). Patch by Nadeem Vawda.
bpo-11335: Fixed a memory leak in list.sort when the key function throwsan exception.
bpo-8923: When a string is encoded to UTF-8 in strict mode, the result iscached into the object. Examples: str.encode(), str.encode(‘utf-8’),PyUnicode_AsUTF8String() and PyUnicode_AsEncodedString(unicode, “utf-8”,NULL).
bpo-10829: Refactor PyUnicode_FromFormat(), use the same function to parsethe format string in the 3 steps, fix crashs on invalid format strings.
bpo-13007: whichdb should recognize gdbm 1.9 magic numbers.
bpo-11286: Raise a ValueError from calling PyMemoryView_FromBuffer with abuffer struct having a NULL data pointer.
bpo-11272: On Windows, input() strips ‘r’ (and not only ‘n’), andsys.stdin uses universal newline (replace ‘rn’ by ‘n’).
bpo-11828: startswith and endswith now accept None as slice index. Patchby Torsten Becker.
bpo-11168: Remove filename debug variable from PyEval_EvalFrameEx(). Itencoded the Unicode filename to UTF-8, but the encoding fails onundecodable filename (on surrogate characters) which raises an unexpectedUnicodeEncodeError on recursion limit.
bpo-11187: Remove bootstrap code (use ASCII) ofPyUnicode_AsEncodedString(), it was replaced by a better fallback (use thelocale encoding) in PyUnicode_EncodeFSDefault().
Check for NULL result in PyType_FromSpec.
bpo-10516: New copy() and clear() methods for lists and bytearrays.
bpo-11386: bytearray.pop() now throws IndexError when the bytearray isempty, instead of OverflowError.
bpo-12380: The rjust, ljust and center methods of bytes and bytearray nowaccept a bytearray argument.
(For information about older versions, consult the HISTORY file.)
Enter search terms or a module, class or function name.
