mirror of https://github.com/python/cpython
167 lines
3.8 KiB
ReStructuredText
167 lines
3.8 KiB
ReStructuredText
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****************************
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What's New In Python 3.14
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****************************
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:Editor: TBD
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.. Rules for maintenance:
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* Anyone can add text to this document. Do not spend very much time
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on the wording of your changes, because your text will probably
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get rewritten to some degree.
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* The maintainer will go through Misc/NEWS periodically and add
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changes; it's therefore more important to add your changes to
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Misc/NEWS than to this file.
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* This is not a complete list of every single change; completeness
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is the purpose of Misc/NEWS. Some changes I consider too small
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or esoteric to include. If such a change is added to the text,
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I'll just remove it. (This is another reason you shouldn't spend
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too much time on writing your addition.)
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* If you want to draw your new text to the attention of the
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maintainer, add 'XXX' to the beginning of the paragraph or
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section.
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* It's OK to just add a fragmentary note about a change. For
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example: "XXX Describe the transmogrify() function added to the
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socket module." The maintainer will research the change and
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write the necessary text.
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* You can comment out your additions if you like, but it's not
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necessary (especially when a final release is some months away).
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* Credit the author of a patch or bugfix. Just the name is
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sufficient; the e-mail address isn't necessary.
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* It's helpful to add the issue number as a comment:
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XXX Describe the transmogrify() function added to the socket
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module.
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(Contributed by P.Y. Developer in :gh:`12345`.)
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This saves the maintainer the effort of going through the VCS log
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when researching a change.
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This article explains the new features in Python 3.14, compared to 3.13.
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For full details, see the :ref:`changelog <changelog>`.
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.. note::
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Prerelease users should be aware that this document is currently in draft
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form. It will be updated substantially as Python 3.14 moves towards release,
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so it's worth checking back even after reading earlier versions.
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Summary -- Release highlights
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=============================
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.. This section singles out the most important changes in Python 3.14.
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Brevity is key.
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.. PEP-sized items next.
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New Features
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============
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Other Language Changes
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======================
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New Modules
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===========
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* None yet.
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Improved Modules
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================
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Optimizations
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=============
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Deprecated
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==========
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Removed
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=======
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argparse
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--------
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* The *type*, *choices*, and *metavar* parameters
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of :class:`!argparse.BooleanOptionalAction` are removed.
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They were deprecated since 3.12.
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email
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-----
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* The *isdst* parameter has been removed from :func:`email.utils.localtime`.
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(Contributed by Hugo van Kemenade in :gh:`118798`.)
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pathlib
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-------
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* Remove support for passing additional positional arguments to
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:meth:`pathlib.PurePath.relative_to` and
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:meth:`~pathlib.PurePath.is_relative_to`. In previous versions, any such
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arguments are joined onto *other*.
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Others
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------
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* Using :data:`NotImplemented` in a boolean context will now raise a :exc:`TypeError`.
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It had previously raised a :exc:`DeprecationWarning` since Python 3.9. (Contributed
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by Jelle Zijlstra in :gh:`118767`.)
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* :class:`!typing.ByteString` and :class:`!collections.abc.ByteString`
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are removed. They had previously raised a :exc:`DeprecationWarning`
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since Python 3.12.
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* :mod:`itertools` support for copy, deepcopy, and pickle operations.
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These had previously raised a :exc:`DeprecationWarning` since Python 3.12.
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(Contributed by Raymond Hettinger in :gh:`101588`.)
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Porting to Python 3.14
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======================
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This section lists previously described changes and other bugfixes
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that may require changes to your code.
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Build Changes
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=============
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C API Changes
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=============
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New Features
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------------
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Porting to Python 3.14
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----------------------
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Deprecated
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----------
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Removed
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-------
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