[issue9625] argparse: Problem with defaults for variable nargs when using choices

[Mihail Milushev]

Mihail Milushev <python.org at site.lanzz.org> added the comment:

It looks like choices are broken for nargs='*' even without using default:

>>> import argparse
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('test', nargs='*', choices=['foo', 'bar', 'baz'])
_StoreAction(option_strings=[], dest='test', nargs='*', const=None, default=None, type=None, choices=['foo', 'bar', 'baz'], help=None, metavar=None)
>>> parser.parse_args([])
usage: [-h] [{foo,bar,baz} [{foo,bar,baz} ...]]
: error: argument test: invalid choice: [] (choose from 'foo', 'bar', 'baz')

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nosy: +lanzz

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue9625>
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