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[3.12] gh-72795: Make positional arguments with nargs='*' or REMAINDER non-required (GH-124306) (GH-124422)

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This allows to use positional argument with nargs='*' and without default
in mutually exclusive group and improves error message about required
arguments.
(cherry picked from commit 3c83f9958c)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
This commit is contained in:
Miss Islington (bot) 2024-09-24 10:43:26 +02:00 • committed by GitHub
parent 0e838b52fe
commit 7e2d414a59
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3 changed files with 32 additions and 8 deletions
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Lib/argparse.py
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@ -1575,9 +1575,8 @@ class _ActionsContainer(object):
# mark positional arguments as required if at least one is
# always required
if kwargs.get('nargs') not in [OPTIONAL, ZERO_OR_MORE]:
kwargs['required'] = True
if kwargs.get('nargs') == ZERO_OR_MORE and 'default' not in kwargs:
nargs = kwargs.get('nargs')
if nargs not in [OPTIONAL, ZERO_OR_MORE, REMAINDER, SUPPRESS, 0]:
kwargs['required'] = True
# return the keyword arguments with no option strings