Doc/deprecations/pending-removal-in-3.20.rst

Pending removal in Python 3.20
------------------------------

* Calling the ``__new__()`` method of :class:`struct.Struct` without the
  *format* argument is deprecated and will be removed in Python 3.20.  Calling
  :meth:`~object.__init__` method on initialized :class:`~struct.Struct`
  objects is deprecated and will be removed in Python 3.20.

  (Contributed by Sergey B Kirpichev and Serhiy Storchaka in :gh:`143715`.)

* The ``__version__``, ``version`` and ``VERSION`` attributes have been
  deprecated in these standard library modules and will be removed in
  Python 3.20. Use :py:data:`sys.version_info` instead.

  - :mod:`argparse`
  - :mod:`csv`
  - :mod:`ctypes`
  - :mod:`!ctypes.macholib`
  - :mod:`decimal` (use :data:`decimal.SPEC_VERSION` instead)
  - :mod:`http.server`
  - :mod:`imaplib`
  - :mod:`ipaddress`
  - :mod:`json`
  - :mod:`logging` (``__date__`` also deprecated)
  - :mod:`optparse`
  - :mod:`pickle`
  - :mod:`platform`
  - :mod:`re`
  - :mod:`socketserver`
  - :mod:`tabnanny`
  - :mod:`tarfile`
  - :mod:`tkinter.font`
  - :mod:`tkinter.ttk`
  - :mod:`wsgiref.simple_server`
  - :mod:`xml.etree.ElementTree`
  - :mod:`!xml.sax.expatreader`
  - :mod:`xml.sax.handler`
  - :mod:`zlib`

  (Contributed by Hugo van Kemenade and Stan Ulbrych in :gh:`76007`.)

* Deprecations defined by :pep:`829`:

  * Warnings are produced for ``import`` lines found in :file:`{name}.pth`
    files.

  * :file:`{name}.pth` files are no longer decoded in the locale encoding by
    default.  They **MUST** be encoded in ``utf-8-sig``.

  (Contributed by Barry Warsaw in :gh:`148641`.)

* :mod:`ast`:

  * Creating instances of abstract AST nodes (such as :class:`ast.AST`
    or :class:`!ast.expr`) is deprecated and will raise an error in Python 3.20.

* :mod:`typing`:

  * It is deprecated to call :func:`isinstance` and :func:`issubclass` checks on
    protocol classes that were not explicitly decorated with :func:`!runtime_checkable`
    but that inherit from a runtime-checkable protocol class.
    This will raise a :exc:`TypeError` in Python 3.20.

    (Contributed by Bartosz Sławecki in :gh:`132604`.)