argparse.BooleanOptionalAction accepts and silently discards choices, metavar, and type arguments #92248
Description
This is an elaboration of issue #85039.
>>> parser = ArgumentParser() >>> parser.add_argument('--foo', action=BooleanOptionalAction, ... choices=[1,2], metavar='FOOBAR', type=int) # doctest: +ELLIPSIS BooleanOptionalAction(...) Note that the store_const, store_true, and store_false actions disallow those keyword arguments.
>>> parser.add_argument('--bar', action='store_true', choices=[1,2]) Traceback (most recent call last): ... TypeError: __init__() got an unexpected keyword argument 'choices' >>> parser.add_argument('--bar', action='store_true', metavar='FOOBAR') Traceback (most recent call last): ... TypeError: __init__() got an unexpected keyword argument 'metavar' >>> parser.add_argument('--bar', action='store_true', type=int) Traceback (most recent call last): ... TypeError: __init__() got an unexpected keyword argument 'type' >>> parser.add_argument('--bar', action='store_true') # doctest: +ELLIPSIS _StoreTrueAction(...) Linked PRs
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