Mihail Milushev <python....@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 <rep...@bugs.python.org>
<https://bugs.python.org/issue9625>
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