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[3.8] bpo-26510: Add versionchanged for required arg of add_subparsers (GH-16588) #16608

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Merged
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Oct 7, 2019
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[3.8] bpo-26510: Add versionchanged for required arg of add_subparsers (GH-16588) #16608

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5 changes: 4 additions & 1 deletion Doc/library/argparse.rst
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Expand Up @@ -1595,7 +1595,7 @@ Sub-commands
stored; by default ``None`` and no value is stored

* required_ - Whether or not a subcommand must be provided, by default
``False``.
``False`` (added in 3.7)

* help_ - help for sub-parser group in help output, by default ``None``

Expand Down Expand Up @@ -1751,6 +1751,9 @@ Sub-commands
>>> parser.parse_args(['2', 'frobble'])
Namespace(subparser_name='2', y='frobble')

.. versionchanged:: 3.7
New *required* keyword argument.


FileType objects
^^^^^^^^^^^^^^^^
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4 changes: 4 additions & 0 deletions Doc/whatsnew/3.7.rst
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Expand Up @@ -2401,6 +2401,10 @@ Changes in the Python API
instead of a :class:`bytes` instance.
(Contributed by Victor Stinner in :issue:`21071`.)

* :mod:`argparse` subparsers can now be made mandatory by passing ``required=True``
to :meth:`ArgumentParser.add_subparsers() <argparse.ArgumentParser.add_subparsers>`.
(Contributed by Anthony Sottile in :issue:`26510`.)

* :meth:`ast.literal_eval()` is now stricter. Addition and subtraction of
arbitrary numbers are no longer allowed.
(Contributed by Serhiy Storchaka in :issue:`31778`.)
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