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Oct 22, 2023
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gh-109975: What's new in 3.13: Add PEP 594 to release highlights #110993

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b469a31
Add PEP 594 to release highlights
hugovk Oct 17, 2023
bf34fdf
Group PEP 594 removals, move shared deprecation info to top
hugovk Oct 17, 2023
eb8c0b2
Sort PEP 594 modules
hugovk Oct 17, 2023
e3b52e1
Link PEP 594 highlight to details
hugovk Oct 17, 2023
9a39a96
Merge branch 'main' into whatsnew-3.13-dead-batteries
hugovk Oct 18, 2023
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240 changes: 127 additions & 113 deletions Doc/whatsnew/3.13.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -65,13 +65,23 @@ Summary -- Release highlights

.. PEP-sized items next.

Important deprecations, removals or restrictions:

* :ref:`PEP 594 <whatsnew313-pep594>`: The remaining 19 "dead batteries"
have been removed from the standard library:
:mod:`!aifc`, :mod:`!audioop`, :mod:`!cgi`, :mod:`!cgitb`, :mod:`!chunk`,
:mod:`!crypt`, :mod:`!imghdr`, :mod:`!mailcap`, :mod:`!msilib`, :mod:`!nis`,
:mod:`!nntplib`, :mod:`!ossaudiodev`, :mod:`!pipes`, :mod:`!sndhdr`, :mod:`!spwd`,
:mod:`!sunau`, :mod:`!telnetlib`, :mod:`!uu` and :mod:`!xdrlib`.

* :pep:`602` ("Annual Release Cycle for Python") has been updated:

* Python 3.9 - 3.12 have one and a half years of full support,
followed by three and a half years of security fixes.
* Python 3.13 and later have two years of full support,
followed by three years of security fixes.


New Features
============

Expand Down Expand Up @@ -686,10 +696,123 @@ although there is currently no date scheduled for their removal.
Removed
=======

* :pep:`594`: Remove the :mod:`!telnetlib` module, deprecated in Python 3.11:
use the projects `telnetlib3 <https://pypi.org/project/telnetlib3/>`_ or
`Exscript <https://pypi.org/project/Exscript/>`_ instead.
(Contributed by Victor Stinner in :gh:`104773`.)
.. _whatsnew313-pep594:

PEP 594: dead batteries
-----------------------

* :pep:`594` removed 19 modules from the standard library,
deprecated in Python 3.11:

* :mod:`!aifc`.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!audioop`.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!chunk`.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!cgi` and :mod:`!cgitb`.

* ``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
<https://pypi.org/project/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_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

* ``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 <https://pypi.org/project/multipart/>`__ PyPI project.

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

* :mod:`!crypt` module and its private :mod:`!_crypt` extension.
The :mod:`hashlib` module is a potential replacement for certain use cases.
Otherwise, the following PyPI projects can be used:

* `bcrypt <https://pypi.org/project/bcrypt/>`_:
Modern password hashing for your software and your servers.
* `passlib <https://pypi.org/project/passlib/>`_:
Comprehensive password hashing framework supporting over 30 schemes.
* `argon2-cffi <https://pypi.org/project/argon2-cffi/>`_:
The secure Argon2 password hashing algorithm.
* `legacycrypt <https://pypi.org/project/legacycrypt/>`_:
Wrapper to the POSIX crypt library call and associated functionality.

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

* :mod:`!imghdr`: use the projects
`filetype <https://pypi.org/project/filetype/>`_,
`puremagic <https://pypi.org/project/puremagic/>`_,
or `python-magic <https://pypi.org/project/python-magic/>`_ instead.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!mailcap`.
The :mod:`mimetypes` module provides an alternative.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!msilib`.
(Contributed by Zachary Ware in :gh:`104773`.)

* :mod:`!nis`.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!nntplib`:
the `PyPI nntplib project <https://pypi.org/project/nntplib/>`_
can be used instead.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!ossaudiodev`: use the
`pygame project <https://www.pygame.org/>`_ for audio playback.
(Contributed by Victor Stinner in :gh:`104780`.)

* :mod:`!pipes`: use the :mod:`subprocess` module instead.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!sndhdr`: use the projects
`filetype <https://pypi.org/project/filetype/>`_,
`puremagic <https://pypi.org/project/puremagic/>`_, or
`python-magic <https://pypi.org/project/python-magic/>`_ instead.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!spwd`:
the `python-pam project <https://pypi.org/project/python-pam/>`_
can be used instead.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!sunau`.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!telnetlib`, use the projects
`telnetlib3 <https://pypi.org/project/telnetlib3/>`_ or
`Exscript <https://pypi.org/project/Exscript/>`_ instead.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!uu`: the :mod:`base64` module is a modern alternative.
(Contributed by Victor Stinner in :gh:`104773`.)

* :mod:`!xdrlib`.
(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`.)


* Remove the ``2to3`` program and the :mod:`!lib2to3` module,
deprecated in Python 3.11.
Expand Down Expand Up @@ -731,115 +854,6 @@ Removed

(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
<https://pypi.org/project/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 <https://pypi.org/project/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 <https://pypi.org/project/filetype/>`_, `puremagic
<https://pypi.org/project/puremagic/>`_, or `python-magic
<https://pypi.org/project/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 <https://www.pygame.org/>`_ 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 <https://pypi.org/project/python-pam/>`_ 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 <https://pypi.org/project/nntplib/>`_ 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 <https://pypi.org/project/bcrypt/>`_:
Modern password hashing for your software and your servers.
* `passlib <https://pypi.org/project/passlib/>`_:
Comprehensive password hashing framework supporting over 30 schemes.
* `argon2-cffi <https://pypi.org/project/argon2-cffi/>`_:
The secure Argon2 password hashing algorithm.
* `legacycrypt <https://pypi.org/project/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 <https://pypi.org/project/filetype/>`_,
`puremagic <https://pypi.org/project/puremagic/>`_,
or `python-magic <https://pypi.org/project/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`.)
Expand Down