This article explains the new features in Python 3.13, compared to 3.12.

For full details, see the :ref:`changelog <changelog>`.

• None yet.

• PEP 594: Remove the :mod:`!telnetlib` module, deprecated in Python 3.11: use the projects telnetlib3 or Exscript instead. (Contributed by Victor Stinner in :gh:`104773`.)

• Remove the 2to3 program and the :mod:`!lib2to3` module, deprecated in Python 3.11. (Contributed by Victor Stinner in :gh:`104780`.)

• Namespaces typing.io and typing.re, deprecated in Python 3.8, are now removed. The items in those namespaces can be imported directly from :mod:`typing`. (Contributed by Sebastian Rittau in :gh:`92871`.)

• Remove the untested and undocumented :mod:`webbrowser` :class:`!MacOSX` class, deprecated in Python 3.11. Use the :class:`!MacOSXOSAScript` class (introduced in Python 3.2) instead. (Contributed by Hugo van Kemenade in :gh:`104804`.)

• Remove support for using :class:`pathlib.Path` objects as context managers. This functionality was deprecated and made a no-op in Python 3.9.

• Remove the undocumented :class:`!configparser.LegacyInterpolation` class, deprecated in the docstring since Python 3.2, and with a deprecation warning since Python 3.11. (Contributed by Hugo van Kemenade in :gh:`104886`.)

• Remove the :meth:`!turtle.RawTurtle.settiltangle` method, deprecated in docs since Python 3.1 and with a deprecation warning since Python 3.11. (Contributed by Hugo van Kemenade in :gh:`104876`.)

• Removed the following :mod:`unittest` functions, deprecated in Python 3.11:

  • :func:`!unittest.findTestCases`
  • :func:`!unittest.makeSuite`
  • :func:`!unittest.getTestCaseNames`

  Use :class:`~unittest.TestLoader` methods instead:

  • :meth:`unittest.TestLoader.loadTestsFromModule`
  • :meth:`unittest.TestLoader.loadTestsFromTestCase`
  • :meth:`unittest.TestLoader.getTestCaseNames`

  (Contributed by Hugo van Kemenade in :gh:`104835`.)

• PEP 594: Remove the :mod:`!cgi`` and :mod:`!cgitb` modules, deprecated in Python 3.11.

  • cgi.FieldStorage can typically be replaced with :func:`urllib.parse.parse_qsl` for GET and HEAD requests, and the :mod:`email.message` module or multipart PyPI project for POST and PUT.

  • cgi.parse() can be replaced by calling :func:`urllib.parse.parse_qs` directly on the desired query string, except for multipart/form-data input, which can be handled as described for cgi.parse_multipart().

  • cgi.parse_multipart() can be replaced with the functionality in the :mod:`email` package (e.g. :class:`email.message.EmailMessage` and :class:`email.message.Message`) which implements the same MIME RFCs, or with the multipart PyPI project.

  • cgi.parse_header() can be replaced with the functionality in the :mod:`email` package, which implements the same MIME RFCs. For example, with :class:`email.message.EmailMessage`:

    from email.message import EmailMessage
    msg = EmailMessage()
    msg['content-type'] = 'application/json; charset="utf8"'
    main, params = msg.get_content_type(), msg['content-type'].params
    

  (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!sndhdr` module, deprecated in Python 3.11: use the projects filetype, puremagic, or python-magic instead. (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!pipes` module, deprecated in Python 3.11: use the :mod:`subprocess` module instead. (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!ossaudiodev` module, deprecated in Python 3.11: use the pygame project for audio playback. (Contributed by Victor Stinner in :gh:`104780`.)

• PEP 594: Remove the :mod:`!sunau` module, deprecated in Python 3.11. (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!mailcap` module, deprecated in Python 3.11. The :mod:`mimetypes` module provides an alternative. (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!spwd` module, deprecated in Python 3.11: the python-pam project can be used instead. (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!nntplib` module, deprecated in Python 3.11: the PyPI nntplib project can be used instead. (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!nis` module, deprecated in Python 3.11. (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!xdrlib` module, deprecated in Python 3.11. (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!msilib` module, deprecated in Python 3.11. (Contributed by Zachary Ware in :gh:`104773`.)

• PEP 594: Remove the :mod:`!crypt` module and its private :mod:`!_crypt` extension, deprecated in Python 3.11. The :mod:`hashlib` module is a potential replacement for certain use cases. Otherwise, the following PyPI projects can be used:

  • bcrypt: Modern password hashing for your software and your servers.
  • passlib: Comprehensive password hashing framework supporting over 30 schemes.
  • argon2-cffi: The secure Argon2 password hashing algorithm.
  • legacycrypt: Wrapper to the POSIX crypt library call and associated functionality.

  (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!uu` module, deprecated in Python 3.11: the :mod:`base64` module is a modern alternative. (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!aifc` module, deprecated in Python 3.11. (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!audioop` module, deprecated in Python 3.11. (Contributed by Victor Stinner in :gh:`104773`.)

• PEP 594: Remove the :mod:`!chunk` module, deprecated in Python 3.11. (Contributed by Victor Stinner in :gh:`104773`.)

• Remove support for the keyword-argument method of creating :class:`typing.TypedDict` types, deprecated in Python 3.11. (Contributed by Tomas Roun in :gh:`104786`.)

• PEP 594: Remove the :mod:`!imghdr` module, deprecated in Python 3.11: use the projects filetype, puremagic, or python-magic instead. (Contributed by Victor Stinner in :gh:`104773`.)

• Remove the untested and undocumented :meth:`!unittest.TestProgram.usageExit` method, deprecated in Python 3.11. (Contributed by Hugo van Kemenade in :gh:`104992`.)

• Remove the :mod:`!tkinter.tix` module, deprecated in Python 3.6. The third-party Tix library which the module wrapped is unmaintained. (Contributed by Zachary Ware in :gh:`75552`.)

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