arg_parsing.py 文件源码

def add_dummy_redirect_argument(self, expected_name):
        # type: (argparse.ArgumentParser, str) -> None
        """Adds a dummy redirect argument to the provided parser to catch typos when calling
        the specified valid long-form name.

        :param parser: Parser to which to add argument
        :type parser: argparse.ArgumentParser
        :param str expected_name: Valid long-form name for which to add dummy redirect
        """
        self.add_argument(
            expected_name[1:],
            dest='dummy_redirect',
            action='store_const',
            const=expected_name[1:],
            help=argparse.SUPPRESS
        )
        # ArgumentParser subclass confuses mypy
        self.__dummy_arguments.append(expected_name[1:])  # type: ignore