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bpo-26510: Add versionchanged for required arg of add_subparsers (GH-16588) 

The `required` argument to `argparse.add_subparsers` was added in GH-3027. This PR specifies the earliest version of Python where it is available.

https://bugs.python.org/issue26510

Automerge-Triggered-By: @merwok
(cherry picked from commit 9e71917e02)

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>
This commit is contained in:
Miss Islington (bot) 2019-10-06 19:14:49 -07:00 committed by Ned Deily
parent 6eb5545832
commit f168c17b07
2 changed files with 8 additions and 1 deletions
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5
Doc/library/argparse.rst
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@ -1583,7 +1583,7 @@ Sub-commands
stored; by default ``None`` and no value is stored stored; by default ``None`` and no value is stored
* required_ - Whether or not a subcommand must be provided, by default * 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`` * help_ - help for sub-parser group in help output, by default ``None``
@ -1739,6 +1739,9 @@ Sub-commands
>>> parser.parse_args(['2', 'frobble']) >>> parser.parse_args(['2', 'frobble'])
Namespace(subparser_name='2', y='frobble') Namespace(subparser_name='2', y='frobble')
.. versionchanged:: 3.7
New *required* keyword argument.
FileType objects FileType objects
^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^

4
Doc/whatsnew/3.7.rst
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@ -2414,6 +2414,10 @@ Changes in the Python API
instead of a :class:`bytes` instance. instead of a :class:`bytes` instance.
(Contributed by Victor Stinner in :issue:`21071`.) (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 * :meth:`ast.literal_eval()` is now stricter. Addition and subtraction of
arbitrary numbers are no longer allowed. arbitrary numbers are no longer allowed.
(Contributed by Serhiy Storchaka in :issue:`31778`.) (Contributed by Serhiy Storchaka in :issue:`31778`.)