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gh-123299: Update What's new in Python 3.14: typos and misplaced item. #136665

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2fb131e
Update What's new in Python 3.14: typos and misplaced item.
hunterhogan Jul 15, 2025
b6fa191
"the standard in this file is a one line gap between points and a two…
hunterhogan Jul 15, 2025
25c8714
Merge branch 'main' into whatsnew314
hunterhogan Jul 15, 2025
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42 changes: 39 additions & 3 deletions Doc/whatsnew/3.14.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -122,6 +122,7 @@ it's safe to do so. This can lead to different values returned from
:func:`sys.getrefcount` and :c:func:`Py_REFCNT` compared to previous versions
of Python. See :ref:`below <whatsnew314-refcount>` for details.


New features
============

Expand Down Expand Up @@ -151,6 +152,7 @@ within CPython itself and the community. This decision is for the future.
:pep:`779` and its `acceptance
<https://discuss.python.org/t/pep-779-criteria-for-supported-status-for-free-threaded-python/84319/123>`__.


.. _whatsnew314-pep734:

PEP 734: Multiple interpreters in the stdlib
Expand Down Expand Up @@ -785,6 +787,7 @@ configuration mechanisms).
.. seealso::
:pep:`741`.


.. _whatsnew314-asyncio-introspection:

Asyncio introspection capabilities
Expand Down Expand Up @@ -899,6 +902,7 @@ prevent tree construction:
(Contributed by Pablo Galindo, Łukasz Langa, Yury Selivanov, and Marta
Gomez Macias in :gh:`91048`.)


.. _whatsnew314-tail-call:

A new type of interpreter
Expand Down Expand Up @@ -951,6 +955,7 @@ For further information on how to build Python, see
(Contributed by Ken Jin in :gh:`128563`, with ideas on how to implement this
in CPython by Mark Shannon, Garrett Gu, Haoran Xu, and Josh Haberman.)


.. _whatsnew314-free-threaded-cpython:

Free-threaded mode
Expand Down Expand Up @@ -982,7 +987,7 @@ A new flag has been added, :data:`~sys.flags.context_aware_warnings`. This
flag defaults to true for the free-threaded build and false for the GIL-enabled
build. If the flag is true then the :class:`warnings.catch_warnings` context
manager uses a context variable for warning filters. This makes the context
manager behave predicably when used with multiple threads or asynchronous
manager behave predictably when used with multiple threads or asynchronous
tasks.

A new flag has been added, :data:`~sys.flags.thread_inherit_context`. This flag
Expand Down Expand Up @@ -1043,6 +1048,7 @@ work without modification). Free-threaded builds do not support JIT compilation.

Please report any bugs or major performance regressions that you encounter!


.. seealso:: :pep:`744`

Concurrent safe warnings control
Expand All @@ -1058,6 +1064,7 @@ free-threaded build and false for the GIL-enabled build.

(Contributed by Neil Schemenauer and Kumar Aditya in :gh:`130010`.)


Other language changes
======================

Expand Down Expand Up @@ -1168,6 +1175,7 @@ Other language changes

.. _Jython: https://www.jython.org/


.. _whatsnew314-pep765:

PEP 765: Disallow ``return``/``break``/``continue`` that exit a ``finally`` block
Expand Down Expand Up @@ -1315,6 +1323,7 @@ concurrent.futures
buffer.
(Contributed by Enzo Bonnal and Josh Rosenberg in :gh:`74028`.)


configparser
------------

Expand All @@ -1324,6 +1333,7 @@ configparser
:class:`configparser.InvalidWriteError`.
(Contributed by Jacob Lincoln in :gh:`129270`.)


contextvars
-----------

Expand Down Expand Up @@ -1385,6 +1395,7 @@ ctypes
* :mod:`ctypes` now supports :term:`free-threading builds <free threading>`.
(Contributed by Kumar Aditya and Peter Bierma in :gh:`127945`.)


curses
------

Expand All @@ -1393,12 +1404,14 @@ curses
allows to change the color pair ``0``.
(Contributed by Serhiy Storchaka in :gh:`133139`.)


datetime
--------

* Add :meth:`datetime.time.strptime` and :meth:`datetime.date.strptime`.
(Contributed by Wannes Boeykens in :gh:`41431`.)


decimal
-------

Expand All @@ -1410,13 +1423,15 @@ decimal
corresponding to the IEEE 754 (2008) decimal interchange formats.
(Contributed by Sergey B Kirpichev in :gh:`53032`.)


difflib
-------

* Comparison pages with highlighted changes generated by the
:class:`difflib.HtmlDiff` class now support dark mode.
(Contributed by Jiahao Li in :gh:`129939`.)


dis
---

Expand Down Expand Up @@ -1583,7 +1598,7 @@ io
:exc:`BlockingIOError` if the operation cannot immediately return bytes.
(Contributed by Giovanni Siragusa in :gh:`109523`.)

* Add protocols :class:`io.Reader` and :class:`io.Writer` as a simpler
* Add protocols :class:`io.Reader` and :class:`io.Writer` as simpler
alternatives to the pseudo-protocols :class:`typing.IO`,
:class:`typing.TextIO`, and :class:`typing.BinaryIO`.
(Contributed by Sebastian Rittau in :gh:`127648`.)
Expand All @@ -1609,6 +1624,7 @@ json
<using-on-controlling-color>`.
(Contributed by Tomas Roun in :gh:`131952`.)


linecache
---------

Expand Down Expand Up @@ -1758,6 +1774,7 @@ multiprocessing
:keyword:`finally` clauses to print a stack trace for the terminated
process. (Contributed by Artem Pulkin in :gh:`131913`.)


operator
--------

Expand Down Expand Up @@ -1924,6 +1941,7 @@ socket
* Add many new constants.
(Contributed by Serhiy Storchaka in :gh:`132734`.)


ssl
---

Expand Down Expand Up @@ -2025,6 +2043,7 @@ tkinter
:class:`!tkinter.ttk.OptionMenu`.
(Contributed by Zhikang Yan in :gh:`130482`.)


turtle
------

Expand Down Expand Up @@ -2083,6 +2102,8 @@ typing

(Contributed by Jelle Zijlstra in :gh:`105499`.)

* :class:`typing.TypeAliasType` now supports star unpacking.
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Please move this up one line, the standard in this file is a one line gap between points and a two line gap between sections.



unicodedata
-----------
Expand Down Expand Up @@ -2233,6 +2254,7 @@ asyncio
(Contributed by Yury Selivanov, Pablo Galindo Salgado, and Łukasz Langa
in :gh:`91048`.)


base64
------

Expand Down Expand Up @@ -2417,6 +2439,7 @@ Deprecated

.. include:: ../deprecations/pending-removal-in-future.rst


Removed
=======

Expand All @@ -2435,6 +2458,7 @@ argparse
inheritance. This functionality has been deprecated since Python 3.11.
(Contributed by Savannah Ostrowski in :gh:`127186`.)


ast
---

Expand Down Expand Up @@ -2463,6 +2487,7 @@ ast
Use :attr:`!ast.Constant.value` instead.
(Contributed by Alex Waygood in :gh:`119562`.)


asyncio
-------

Expand Down Expand Up @@ -2583,12 +2608,14 @@ collections.abc
* Remove :class:`!collections.abc.ByteString`. It had previously raised a
:exc:`DeprecationWarning` since Python 3.12.


email
-----

* Remove the *isdst* parameter from :func:`email.utils.localtime`.
(Contributed by Hugo van Kemenade in :gh:`118798`.)


importlib
---------

Expand All @@ -2605,13 +2632,15 @@ importlib

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


itertools
---------

* Remove :mod:`itertools` support for copy, deepcopy, and pickle operations.
These had previously raised a :exc:`DeprecationWarning` since Python 3.12.
(Contributed by Raymond Hettinger in :gh:`101588`.)


pathlib
-------

Expand All @@ -2622,13 +2651,15 @@ pathlib
:meth:`~pathlib.PurePath.is_relative_to`. In previous versions, any such
arguments are joined onto *other*.


pkgutil
-------

* Remove deprecated :func:`!pkgutil.get_loader` and :func:`!pkgutil.find_loader`.
These had previously raised a :exc:`DeprecationWarning` since Python 3.12.
(Contributed by Bénédikt Tran in :gh:`97850`.)


pty
---

Expand All @@ -2637,6 +2668,7 @@ pty
Use :func:`pty.openpty` instead.
(Contributed by Nikita Sobolev in :gh:`118824`.)


sqlite3
-------

Expand All @@ -2650,13 +2682,13 @@ sqlite3
it will now raise a :exc:`sqlite3.ProgrammingError`.
(Contributed by Erlend E. Aasland in :gh:`118928` and :gh:`101693`.)


typing
------

* Remove :class:`!typing.ByteString`. It had previously raised a
:exc:`DeprecationWarning` since Python 3.12.

* :class:`typing.TypeAliasType` now supports star unpacking.

urllib
------
Expand All @@ -2675,6 +2707,7 @@ urllib
:func:`~urllib.request.build_opener`.
(Contributed by Barney Gale in :gh:`84850`.)


Others
------

Expand All @@ -2694,12 +2727,14 @@ CPython bytecode changes
* Replaced the opcode ``BINARY_SUBSCR`` by :opcode:`BINARY_OP` with oparg ``NB_SUBSCR``.
(Contributed by Irit Katriel in :gh:`100239`.)


Porting to Python 3.14
======================

This section lists previously described changes and other bugfixes
that may require changes to your code.


Changes in the Python API
-------------------------

Expand Down Expand Up @@ -2733,6 +2768,7 @@ Build changes
with :c:expr:`Py_NO_LINK_LIB`. (Contributed by Jean-Christophe
Fillion-Robin in :gh:`82909`.)


.. _whatsnew314-pep761:

PEP 761: Discontinuation of PGP signatures
Expand Down
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