ArgumentParser.add_mutually_exclusive_group
- ArgumentParser.add_mutually_exclusive_group(required=False)
Deprecated since 3.11, removed in 3.14. Calling add_argument_group() or add_mutually_exclusive_group() on a mutually exclusive group now raises an exception. This nesting was never supported, often failed to work correctly, and was unintentionally exposed through inheritance.
Create a mutually exclusive group. argparse will make sure that only one of the arguments in the mutually exclusive group was present on the command line:
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1 Example
>>> parser = argparse.ArgumentParser(prog='PROG') >>> group = parser.add_mutually_exclusive_group() >>> group.add_argument('--foo', action='store_true') >>> group.add_argument('--bar', action='store_false') >>> parser.parse_args(['--foo']) Namespace(bar=True, foo=True) >>> parser.parse_args(['--bar']) Namespace(bar=False, foo=False) >>> parser.parse_args(['--foo', '--bar']) usage: PROG [-h] [--foo | --bar] PROG: error: argument --bar: not allowed with argument --foo
from the Python docs