Pending removal in future versions
----------------------------------
The following APIs will be removed in the future,
although there is currently no date scheduled for their removal.
* :mod:`argparse`:
* Nesting argument groups and nesting mutually exclusive
groups are deprecated.
* Passing the undocumented keyword argument *prefix_chars* to
:meth:`~argparse.ArgumentParser.add_argument_group` is now
deprecated.
* The :class:`argparse.FileType` type converter is deprecated.
* :mod:`array`'s ``'u'`` format code (:gh:`57281`)
* :mod:`builtins`:
* ``bool(NotImplemented)``.
* Generators: ``throw(type, exc, tb)`` and ``athrow(type, exc, tb)``
signature is deprecated: use ``throw(exc)`` and ``athrow(exc)`` instead,
the single argument signature.
* Currently Python accepts numeric literals immediately followed by keywords,
for example ``0in x``, ``1or x``, ``0if 1else 2``. It allows confusing and
ambiguous expressions like ``[0x1for x in y]`` (which can be interpreted as
``[0x1 for x in y]`` or ``[0x1f or x in y]``). A syntax warning is raised
if the numeric literal is immediately followed by one of keywords
:keyword:`and`, :keyword:`else`, :keyword:`for`, :keyword:`if`,
:keyword:`in`, :keyword:`is` and :keyword:`or`. In a future release it
will be changed to a syntax error. (:gh:`87999`)
* Support for ``__index__()`` and ``__int__()`` method returning non-int type:
these methods will be required to return an instance of a strict subclass of
:class:`int`.
* Support for ``__float__()`` method returning a strict subclass of
:class:`float`: these methods will be required to return an instance of
:class:`float`.
* Support for ``__complex__()`` method returning a strict subclass of
:class:`complex`: these methods will be required to return an instance of
:class:`complex`.
* Delegation of ``int()`` to ``__trunc__()`` method.
* Passing a complex number as the *real* or *imag* argument in the
:func:`complex` constructor is now deprecated; it should only be passed
as a single positional argument.
(Contributed by Serhiy Storchaka in :gh:`109218`.)
* :mod:`calendar`: ``calendar.January`` and ``calendar.February`` constants are
deprecated and replaced by :data:`calendar.JANUARY` and
:data:`calendar.FEBRUARY`.
(Contributed by Prince Roshan in :gh:`103636`.)
* :attr:`codeobject.co_lnotab`: use the :meth:`codeobject.co_lines` method
instead.
* :mod:`datetime`:
* :meth:`~datetime.datetime.utcnow`:
use ``datetime.datetime.now(tz=datetime.UTC)``.
* :meth:`~datetime.datetime.utcfromtimestamp`:
use ``datetime.datetime.fromtimestamp(timestamp, tz=datetime.UTC)``.
* :mod:`gettext`: Plural value must be an integer.
* :mod:`importlib`:
* ``load_module()`` method: use ``exec_module()`` instead.
* :func:`~importlib.util.cache_from_source` *debug_override* parameter is
deprecated: use the *optimization* parameter instead.
* :mod:`importlib.metadata`:
* ``EntryPoints`` tuple interface.
* Implicit ``None`` on return values.
* :mod:`logging`: the ``warn()`` method has been deprecated
since Python 3.3, use :meth:`~logging.warning` instead.
* :mod:`mailbox`: Use of StringIO input and text mode is deprecated, use
BytesIO and binary mode instead.
* :mod:`os`: Calling :func:`os.register_at_fork` in multi-threaded process.
* :class:`!pydoc.ErrorDuringImport`: A tuple value for *exc_info* parameter is
deprecated, use an exception instance.
* :mod:`re`: More strict rules are now applied for numerical group references
and group names in regular expressions. Only sequence of ASCII digits is now
accepted as a numerical reference. The group name in bytes patterns and
replacement strings can now only contain ASCII letters and digits and
underscore.
(Contributed by Serhiy Storchaka in :gh:`91760`.)
* :mod:`!sre_compile`, :mod:`!sre_constants` and :mod:`!sre_parse` modules.
* :mod:`shutil`: :func:`~shutil.rmtree`'s *onerror* parameter is deprecated in
Python 3.12; use the *onexc* parameter instead.
* :mod:`ssl` options and protocols:
* :class:`ssl.SSLContext` without protocol argument is deprecated.
* :class:`ssl.SSLContext`: :meth:`~ssl.SSLContext.set_npn_protocols` and
:meth:`!selected_npn_protocol` are deprecated: use ALPN
instead.
* ``ssl.OP_NO_SSL*`` options
* ``ssl.OP_NO_TLS*`` options
* ``ssl.PROTOCOL_SSLv3``
* ``ssl.PROTOCOL_TLS``
* ``ssl.PROTOCOL_TLSv1``
* ``ssl.PROTOCOL_TLSv1_1``
* ``ssl.PROTOCOL_TLSv1_2``
* ``ssl.TLSVersion.SSLv3``
* ``ssl.TLSVersion.TLSv1``
* ``ssl.TLSVersion.TLSv1_1``
* :func:`sysconfig.is_python_build` *check_home* parameter is deprecated and
ignored.
* :mod:`threading` methods:
* :meth:`!threading.Condition.notifyAll`: use :meth:`~threading.Condition.notify_all`.
* :meth:`!threading.Event.isSet`: use :meth:`~threading.Event.is_set`.
* :meth:`!threading.Thread.isDaemon`, :meth:`threading.Thread.setDaemon`:
use :attr:`threading.Thread.daemon` attribute.
* :meth:`!threading.Thread.getName`, :meth:`threading.Thread.setName`:
use :attr:`threading.Thread.name` attribute.
* :meth:`!threading.currentThread`: use :meth:`threading.current_thread`.
* :meth:`!threading.activeCount`: use :meth:`threading.active_count`.
* :class:`typing.Text` (:gh:`92332`).
* :class:`unittest.IsolatedAsyncioTestCase`: it is deprecated to return a value
that is not ``None`` from a test case.
* :mod:`urllib.parse` deprecated functions: :func:`~urllib.parse.urlparse` instead
* ``splitattr()``
* ``splithost()``
* ``splitnport()``
* ``splitpasswd()``
* ``splitport()``
* ``splitquery()``
* ``splittag()``
* ``splittype()``
* ``splituser()``
* ``splitvalue()``
* ``to_bytes()``
* :mod:`wsgiref`: ``SimpleHandler.stdout.write()`` should not do partial
writes.
* :mod:`xml.etree.ElementTree`: Testing the truth value of an
:class:`~xml.etree.ElementTree.Element` is deprecated. In a future release it
will always return ``True``. Prefer explicit ``len(elem)`` or
``elem is not None`` tests instead.
* :meth:`zipimport.zipimporter.load_module` is deprecated:
use :meth:`~zipimport.zipimporter.exec_module` instead.
Codebase Browser
cpython