mirror of https://github.com/python/cpython
113 lines
4.5 KiB
ReStructuredText
113 lines
4.5 KiB
ReStructuredText
Pending removal in Python 3.14
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------------------------------
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* The import system:
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* Setting :attr:`~module.__loader__` on a module while
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failing to set :attr:`__spec__.loader <importlib.machinery.ModuleSpec.loader>`
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is deprecated. In Python 3.14, :attr:`!__loader__` will cease to be set or
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taken into consideration by the import system or the standard library.
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* :mod:`argparse`: The *type*, *choices*, and *metavar* parameters
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of :class:`!argparse.BooleanOptionalAction` are deprecated
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and will be removed in 3.14.
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(Contributed by Nikita Sobolev in :gh:`92248`.)
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* :mod:`ast`: The following features have been deprecated in documentation
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since Python 3.8, now cause a :exc:`DeprecationWarning` to be emitted at
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runtime when they are accessed or used, and will be removed in Python 3.14:
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* :class:`!ast.Num`
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* :class:`!ast.Str`
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* :class:`!ast.Bytes`
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* :class:`!ast.NameConstant`
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* :class:`!ast.Ellipsis`
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Use :class:`ast.Constant` instead.
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(Contributed by Serhiy Storchaka in :gh:`90953`.)
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* :mod:`asyncio`:
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* The child watcher classes :class:`!asyncio.MultiLoopChildWatcher`,
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:class:`!asyncio.FastChildWatcher`, :class:`!asyncio.AbstractChildWatcher`
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and :class:`!asyncio.SafeChildWatcher` are deprecated and
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will be removed in Python 3.14.
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(Contributed by Kumar Aditya in :gh:`94597`.)
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* :func:`!asyncio.set_child_watcher`, :func:`!asyncio.get_child_watcher`,
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:meth:`!asyncio.AbstractEventLoopPolicy.set_child_watcher` and
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:meth:`!asyncio.AbstractEventLoopPolicy.get_child_watcher` are deprecated
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and will be removed in Python 3.14.
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(Contributed by Kumar Aditya in :gh:`94597`.)
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* The :meth:`~asyncio.get_event_loop` method of the
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default event loop policy now emits a :exc:`DeprecationWarning` if there
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is no current event loop set and it decides to create one.
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(Contributed by Serhiy Storchaka and Guido van Rossum in :gh:`100160`.)
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* :mod:`collections.abc`: Deprecated :class:`!collections.abc.ByteString`.
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Prefer :class:`!Sequence` or :class:`~collections.abc.Buffer`.
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For use in typing, prefer a union, like ``bytes | bytearray``,
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or :class:`collections.abc.Buffer`.
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(Contributed by Shantanu Jain in :gh:`91896`.)
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* :mod:`email`: Deprecated the *isdst* parameter in :func:`email.utils.localtime`.
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(Contributed by Alan Williams in :gh:`72346`.)
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* :mod:`importlib.abc` deprecated classes:
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* :class:`!importlib.abc.ResourceReader`
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* :class:`!importlib.abc.Traversable`
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* :class:`!importlib.abc.TraversableResources`
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Use :mod:`importlib.resources.abc` classes instead:
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* :class:`importlib.resources.abc.Traversable`
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* :class:`importlib.resources.abc.TraversableResources`
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(Contributed by Jason R. Coombs and Hugo van Kemenade in :gh:`93963`.)
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* :mod:`itertools` had undocumented, inefficient, historically buggy,
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and inconsistent support for copy, deepcopy, and pickle operations.
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This will be removed in 3.14 for a significant reduction in code
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volume and maintenance burden.
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(Contributed by Raymond Hettinger in :gh:`101588`.)
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* :mod:`multiprocessing`: The default start method will change to a safer one on
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Linux, BSDs, and other non-macOS POSIX platforms where ``'fork'`` is currently
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the default (:gh:`84559`). Adding a runtime warning about this was deemed too
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disruptive as the majority of code is not expected to care. Use the
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:func:`~multiprocessing.get_context` or
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:func:`~multiprocessing.set_start_method` APIs to explicitly specify when
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your code *requires* ``'fork'``. See :ref:`multiprocessing-start-methods`.
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* :mod:`pathlib`: :meth:`~pathlib.PurePath.is_relative_to` and
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:meth:`~pathlib.PurePath.relative_to`: passing additional arguments is
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deprecated.
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* :mod:`pkgutil`: :func:`!pkgutil.find_loader` and :func:!pkgutil.get_loader`
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now raise :exc:`DeprecationWarning`;
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use :func:`importlib.util.find_spec` instead.
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(Contributed by Nikita Sobolev in :gh:`97850`.)
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* :mod:`pty`:
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* ``master_open()``: use :func:`pty.openpty`.
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* ``slave_open()``: use :func:`pty.openpty`.
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* :mod:`sqlite3`:
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* :data:`!version` and :data:`!version_info`.
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* :meth:`~sqlite3.Cursor.execute` and :meth:`~sqlite3.Cursor.executemany`
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if :ref:`named placeholders <sqlite3-placeholders>` are used and
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*parameters* is a sequence instead of a :class:`dict`.
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* :mod:`typing`: :class:`!typing.ByteString`, deprecated since Python 3.9,
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now causes a :exc:`DeprecationWarning` to be emitted when it is used.
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* :mod:`urllib`:
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:class:`!urllib.parse.Quoter` is deprecated: it was not intended to be a
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public API.
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(Contributed by Gregory P. Smith in :gh:`88168`.)
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