cli.py 文件源码

def add(self, topic, *args, **kwargs):
        """Add a new command line argument.

        :param str: help topic this should be listed under, can be None for
                    "always documented"
        :param list *args: the names of this argument flag
        :param dict **kwargs: various argparse settings for this argument

        """

        if self.detect_defaults:
            kwargs = self.modify_kwargs_for_default_detection(**kwargs)

        if self.visible_topics[topic]:
            if topic in self.groups:
                group = self.groups[topic]
                group.add_argument(*args, **kwargs)
            else:
                self.parser.add_argument(*args, **kwargs)
        else:
            kwargs["help"] = argparse.SUPPRESS
            self.parser.add_argument(*args, **kwargs)