:func:`time.time` and the:attr:`~os.stat_result.st_mtime` attribute of

the object returned by:func:`os.stat`.

..attribute::name

The filename.

..versionchanged::3.1

Support for the:keyword:`with` statement was added, along with the

*mtime* constructor argument and:attr:`mtime` attribute.

* Add:func:`inspect.markcoroutinefunction` to mark sync functions that return

a:term:`coroutine` for use with:func:`iscoroutinefunction`.

a:term:`coroutine` for use with:func:`inspect.iscoroutinefunction`.

(Contributed Carlton Gibson in:gh:`99247`.)

pathlib

* Pseudo instruction opcodes (which are used by the compiler but

do not appear in executable bytecode) are now exposed in the

:mod:`dis` module.

:data:`~dis.HAVE_ARGUMENT` is still relevant to real opcodes,

:opcode:`HAVE_ARGUMENT` is still relevant to real opcodes,

but it is not useful for pseudo instructions. Use the new

:data:`~dis.hasarg` collection instead.

(Contributed by Irit Katriel in:gh:`94216`.)

(Contributed by Kevin Modzelewski in:gh:`90536`.)

* Speed up the regular expression substitution (functions:func:`re.sub` and

:func:`re.subn` and corresponding:class:`re.Pattern` methods) for

:func:`re.subn` and corresponding:class:`!re.Pattern` methods) for

replacement strings containing group references by 2--3 times.

(Contributed by Serhiy Storchaka in:gh:`91524`.)

:exc:`ImportWarning`).

(Contributed by Brett Cannon in:gh:`65961`.)

* The:meth:`~asyncio.DefaultEventLoopPolicy.get_event_loop` method of the

* The:meth:`~asyncio.get_event_loop` method of the

default event loop policy now emits a:exc:`DeprecationWarning` if there

is no current event loop set and it decides to create one.

(Contributed by Serhiy Storchaka and Guido van Rossum in:gh:`100160`.)

APIs:

*:class:`configparser.LegacyInterpolation` (:gh:`90765`)

*:class:`!configparser.LegacyInterpolation` (:gh:`90765`)

*:func:`locale.getdefaultlocale` (:gh:`90817`)

*:meth:`turtle.RawTurtle.settiltangle` (:gh:`50096`)

*:func:`unittest.findTestCases` (:gh:`50096`)

*:func:`unittest.makeSuite` (:gh:`50096`)

*:func:`unittest.getTestCaseNames` (:gh:`50096`)

*:class:`webbrowser.MacOSX` (:gh:`86421`)

*:meth:`!turtle.RawTurtle.settiltangle` (:gh:`50096`)

*:func:`!unittest.findTestCases` (:gh:`50096`)

*:func:`!unittest.makeSuite` (:gh:`50096`)

*:func:`!unittest.getTestCaseNames` (:gh:`50096`)

*:class:`!webbrowser.MacOSX` (:gh:`86421`)

Pending Removal in Python 3.14

* Deprecated the following:mod:`importlib.abc` classes, scheduled for removal in

Python 3.14:

*:class:`importlib.abc.ResourceReader`

*:class:`importlib.abc.Traversable`

*:class:`importlib.abc.TraversableResources`

*:class:`!importlib.abc.ResourceReader`

*:class:`!importlib.abc.Traversable`

*:class:`!importlib.abc.TraversableResources`

Use:mod:`importlib.resources.abc` classes instead:

(Contributed by Jason R. Coombs and Hugo van Kemenade in:gh:`93963`.)

* Creating:c:data:`immutable types<Py_TPFLAGS_IMMUTABLETYPE>` with mutable

* Creating immutable types(:data:`Py_TPFLAGS_IMMUTABLETYPE`) with mutable

bases using the C API.

* ``__package__`` and ``__cached__`` will cease to be set or taken

* Remove ``io.OpenWrapper`` and ``_pyio.OpenWrapper``, deprecated in Python

3.10: just use:func:`open` instead. The:func:`open` (:func:`io.open`)

function is a built-in function. Since Python 3.10,:func:`_pyio.open` is

function is a built-in function. Since Python 3.10,:func:`!_pyio.open` is

also a static method.

(Contributed by Victor Stinner in:gh:`94169`.)

* Remove the:func:`ssl.RAND_pseudo_bytes` function, deprecated in Python 3.6:

* Remove the:func:`!ssl.RAND_pseudo_bytes` function, deprecated in Python 3.6:

use:func:`os.urandom` or:func:`ssl.RAND_bytes` instead.

(Contributed by Victor Stinner in:gh:`94199`.)

extension if it was not present.

(Contributed by Victor Stinner in:gh:`94196`.)

* Remove the:func:`ssl.match_hostname` function. The

:func:`ssl.match_hostname` was deprecated in Python 3.7. OpenSSL performs

* Remove the:func:`!ssl.match_hostname` function.

It was deprecated in Python 3.7. OpenSSL performs

hostname matching since Python 3.7, Python no longer uses the

:func:`ssl.match_hostname` function.

:func:`!ssl.match_hostname` function.

(Contributed by Victor Stinner in:gh:`94199`.)

* Remove the:func:`locale.format` function, deprecated in Python 3.7:

* Remove the:func:`!locale.format` function, deprecated in Python 3.7:

use:func:`locale.format_string` instead.

(Contributed by Victor Stinner in:gh:`94226`.)

a C implementation of:func:`~hashlib.pbkdf2_hmac()` which is faster.

(Contributed by Victor Stinner in:gh:`94199`.)

*:mod:`xml.etree`: Remove the ``ElementTree.Element.copy()`` method of the

*:mod:`xml.etree.ElementTree`: Remove the ``ElementTree.Element.copy()`` method of the

pure Python implementation, deprecated in Python 3.10, use the

:func:`copy.copy` function instead. The C implementation of:mod:`xml.etree`

:func:`copy.copy` function instead. The C implementation of:mod:`xml.etree.ElementTree`

has no ``copy()`` method, only a ``__copy__()`` method.

(Contributed by Victor Stinner in:gh:`94383`.)

:pep:`451` for the rationale.

(Contributed by Victor Stinner in:gh:`94379`.)

* Remove the:func:`ssl.wrap_socket` function, deprecated in Python 3.7:

* Remove the:func:`!ssl.wrap_socket` function, deprecated in Python 3.7:

instead, create a:class:`ssl.SSLContext` object and call its

:class:`ssl.SSLContext.wrap_socket` method. Any package that still uses

:func:`ssl.wrap_socket` is broken and insecure. The function neither sends a

:func:`!ssl.wrap_socket` is broken and insecure. The function neither sends a

SNI TLS extension nor validates server hostname. Code is subject to `CWE-295

<https://cwe.mitre.org/data/definitions/295.html>`_: Improper Certificate

Validation.

The:const:`Py_TPFLAGS_HAVE_VECTORCALL` flag is now removed from a class

when the class's:py:meth:`~object.__call__` method is reassigned.

This makes vectorcall safe to use with mutable types (i.e. heap types

without the:const:`immutable <Py_TPFLAGS_IMMUTABLETYPE>` flag).

without theimmutable flag,:const:`Py_TPFLAGS_IMMUTABLETYPE`).

Mutable types that do not override:c:member:`~PyTypeObject.tp_call` now

inherit the ``Py_TPFLAGS_HAVE_VECTORCALL`` flag.

(Contributed by Petr Viktorin in:gh:`93274`.)

(Contributed by Andrew Frost in:gh:`92257`.)

* The C API now permits registering callbacks via:c:func:`PyDict_AddWatcher`,

:c:func:`PyDict_AddWatch` and related APIs to be called whenever a dictionary

:c:func:`PyDict_Watch` and related APIs to be called whenever a dictionary

is modified. This is intended for use by optimizing interpreters, JIT

compilers, or debuggers.

(Contributed by Carl Meyer in:gh:`91052`.)

supported, but does not fully support multiple inheritance

(:gh:`95589`), and performance may be worse.

Classes declaring:const:`Py_TPFLAGS_MANAGED_DICT` should call

:c:func:`_PyObject_VisitManagedDict` and:c:func:`_PyObject_ClearManagedDict`

:c:func:`!_PyObject_VisitManagedDict` and:c:func:`!_PyObject_ClearManagedDict`

to traverse and clear their instance's dictionaries.

To clear weakrefs, call:c:func:`PyObject_ClearWeakRefs`, as before.

To clear weakrefs, call:c:func:`!PyObject_ClearWeakRefs`, as before.

* The:c:func:`PyUnicode_FSDecoder` function no longer accepts bytes-like

paths, like:class:`bytearray` and:class:`memoryview` types: only the exact

*:c:var:`Py_HashRandomizationFlag`: use:c:member:`PyConfig.use_hash_seed`

and:c:member:`PyConfig.hash_seed`

*:c:var:`Py_IsolatedFlag`: use:c:member:`PyConfig.isolated`

*:c:var:`Py_LegacyWindowsFSEncodingFlag`: use:c:member:`PyConfig.legacy_windows_fs_encoding`

*:c:var:`Py_LegacyWindowsFSEncodingFlag`: use:c:member:`PyPreConfig.legacy_windows_fs_encoding`

*:c:var:`Py_LegacyWindowsStdioFlag`: use:c:member:`PyConfig.legacy_windows_stdio`

*:c:var:`Py_FileSystemDefaultEncoding`: use:c:member:`PyConfig.filesystem_encoding`

*:c:var:`Py_FileSystemDefaultEncodeErrors`: use:c:member:`PyConfig.filesystem_errors`

*:c:var:`Py_UTF8Mode`: use:c:member:`PyPreConfig.utf8_mode` (see:c:func:`Py_PreInitialize`)

*:c:var:`!Py_FileSystemDefaultEncoding`: use:c:member:`PyConfig.filesystem_encoding`

*:c:var:`!Py_FileSystemDefaultEncodeErrors`: use:c:member:`PyConfig.filesystem_errors`

*:c:var:`!Py_UTF8Mode`: use:c:member:`PyPreConfig.utf8_mode` (see:c:func:`Py_PreInitialize`)

The:c:func:`Py_InitializeFromConfig` API should be used with

:c:type:`PyConfig` instead.

(Contributed by Victor Stinner in:gh:`77782`.)

* Creating:c:data:`immutable types <Py_TPFLAGS_IMMUTABLETYPE>` with mutable

* Creating:const:`immutable types <Py_TPFLAGS_IMMUTABLETYPE>` with mutable

bases is deprecated and will be disabled in Python 3.14.

* The ``structmember.h`` header is deprecated, though it continues to be

* Legacy Unicode APIs have been removed. See:pep:`623` for detail.

*:c:macro:`PyUnicode_WCHAR_KIND`

*:c:func:`PyUnicode_AS_UNICODE`

*:c:func:`PyUnicode_AsUnicode`

*:c:func:`PyUnicode_AsUnicodeAndSize`

*:c:func:`PyUnicode_AS_DATA`

*:c:func:`PyUnicode_FromUnicode`

*:c:func:`PyUnicode_GET_SIZE`

*:c:func:`PyUnicode_GetSize`

*:c:func:`PyUnicode_GET_DATA_SIZE`

*:c:macro:`!PyUnicode_WCHAR_KIND`

*:c:func:`!PyUnicode_AS_UNICODE`

*:c:func:`!PyUnicode_AsUnicode`

*:c:func:`!PyUnicode_AsUnicodeAndSize`

*:c:func:`!PyUnicode_AS_DATA`

*:c:func:`!PyUnicode_FromUnicode`

*:c:func:`!PyUnicode_GET_SIZE`

*:c:func:`!PyUnicode_GetSize`

*:c:func:`!PyUnicode_GET_DATA_SIZE`

* Remove the ``PyUnicode_InternImmortal()`` function and the

``SSTATE_INTERNED_IMMORTAL`` macro.

:c:data:`Py_FileSystemDefaultEncodeErrors` and:c:data:`Py_UTF8Mode` are

:c:data:`!Py_FileSystemDefaultEncodeErrors` and:c:data:`!Py_UTF8Mode` are

available again in limited API.