Method __init__

Lib/argparse.py:924–950

(self,
                 option_strings,
                 dest,
                 default=None,
                 required=False,
                 help=None,
                 deprecated=False)

class BooleanOptionalAction(Action):
    def __init__(self,
                 option_strings,
                 dest,
                 default=None,
                 required=False,
                 help=None,
                 deprecated=False):

        _option_strings = []
        for option_string in option_strings:
            _option_strings.append(option_string)

            if option_string.startswith('--'):
                if option_string.startswith('--no-'):
                    raise ValueError(f'invalid option name {option_string!r} '
                                     f'for BooleanOptionalAction')
                option_string = '--no-' + option_string[2:]
                _option_strings.append(option_string)

        super().__init__(
            option_strings=_option_strings,
            dest=dest,
            nargs=0,
            default=default,
            required=required,
            help=help,
            deprecated=deprecated)


    def __call__(self, parser, namespace, values, option_string=None):