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gh-95913: Copyedit/improve Implementation Changes What's New section (#97720)
* Add and refine reST/Sphinx syntax for implementation changes section * Clarify and refine wording in the Implementation Changes section * Elide unnecessary comma Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com> Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>
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@ -480,17 +480,24 @@ Other Language Changes
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there is a mixture of :class:`str` and :class:`bytes` keys.
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(Contributed by Thomas Grainger in :gh:`91181`.)
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.. _whatsnew311-other-implementation-changes:
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Other CPython Implementation Changes
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====================================
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* Special methods :meth:`complex.__complex__` and :meth:`bytes.__bytes__` are implemented to
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support :class:`typing.SupportsComplex` and :class:`typing.SupportsBytes` protocols.
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* The special methods :meth:`~object.__complex__` for :class:`complex`
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and :meth:`~object.__bytes__` for :class:`bytes` are implemented to support
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the :class:`typing.SupportsComplex` and :class:`typing.SupportsBytes` protocols.
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(Contributed by Mark Dickinson and Dong-hee Na in :issue:`24234`.)
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* ``siphash13`` is added as a new internal hashing algorithms. It has similar security
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properties as ``siphash24`` but it is slightly faster for long inputs. ``str``, ``bytes``,
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and some other types now use it as default algorithm for :func:`hash`. :pep:`552`
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hash-based pyc files now use ``siphash13``, too.
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* ``siphash13`` is added as a new internal hashing algorithm.
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It has similar security properties as ``siphash24``,
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but it is slightly faster for long inputs.
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:class:`str`, :class:`bytes`, and some other types
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now use it as the default algorithm for :func:`hash`.
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:pep:`552` :ref:`hash-based .pyc files <pyc-invalidation>`
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now use ``siphash13`` too.
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(Contributed by Inada Naoki in :issue:`29410`.)
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* When an active exception is re-raised by a :keyword:`raise` statement with no parameters,
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@ -499,25 +506,28 @@ Other CPython Implementation Changes
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reflected in the re-raised exception.
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(Contributed by Irit Katriel in :issue:`45711`.)
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* The interpreter state's representation of handled exceptions (a.k.a exc_info, or
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_PyErr_StackItem) now has only the ``exc_value`` field, ``exc_type`` and ``exc_traceback``
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have been removed as their values can be derived from ``exc_value``.
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* The interpreter state's representation of handled exceptions
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(aka ``exc_info`` or ``_PyErr_StackItem``)
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now only has the ``exc_value`` field; ``exc_type`` and ``exc_traceback``
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have been removed, as they can be derived from ``exc_value``.
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(Contributed by Irit Katriel in :issue:`45711`.)
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* A new command line option for the Windows installer ``AppendPath`` has been added.
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It behaves similiar to ``PrependPath`` but appends the install and scripts directories
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instead of prepending them.
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* A new :ref:`command line option <install-quiet-option>`, ``AppendPath``,
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has been added for the Windows installer.
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It behaves similarly to ``PrependPath``,
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but appends the install and scripts directories instead of prepending them.
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(Contributed by Bastian Neuburger in :issue:`44934`.)
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* The :c:member:`PyConfig.module_search_paths_set` field must now be set to 1 for
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* The :c:member:`PyConfig.module_search_paths_set` field must now be set to ``1`` for
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initialization to use :c:member:`PyConfig.module_search_paths` to initialize
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:data:`sys.path`. Otherwise, initialization will recalculate the path and replace
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any values added to ``module_search_paths``.
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* The output of the :option:`--help` option is changed to fit inside 50 lines and 80
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columns. Information about :ref:`Python environment variables <using-on-envvars>`
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and :option:`-X options <-X>` is available with the new :option:`--help-env` or
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:option:`--help-xoptions` flags, and with :option:`--help-all`.
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* The output of the :option:`--help` option now fits in 50 lines/80 columns.
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Information about :ref:`Python environment variables <using-on-envvars>`
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and :option:`-X` options is now available using the respective
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:option:`--help-env` and :option:`--help-xoptions` flags,
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and with the new :option:`--help-all`.
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(Contributed by Éric Araujo in :issue:`46142`.)
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