__init__.py 文件源码

def create_parser(self, prog, func_stack=(), parent=None):
        """
        Creates an ArgumentParser instance from options returned
        by get_options(), and subparser for the given commands.
        """
        prog = os.path.basename(prog)
        func_stack=func_stack+(self,)

        options_parser = argparse.ArgumentParser(add_help=False)
        for option in self.get_options():
            options_parser.add_argument(*option.args, **option.kwargs)

        parser = argparse.ArgumentParser(prog=prog, usage=self.usage,
                                         description=self.description,
                                         parents=[options_parser],
                                         add_help=False)
        add_help(parser, self.help_args)

        self._patch_argparser(parser)

        subparsers = parser.add_subparsers()

        for name, command in self._commands.items():
            usage = getattr(command, 'usage', None)
            help = getattr(command, 'help', None)
            if help is None: help = command.__doc__
            description = getattr(command, 'description', None)
            if description is None: description = command.__doc__

            command_parser = command.create_parser(name, func_stack=func_stack, parent=self)

            subparser = subparsers.add_parser(name, usage=usage, help=help,
                                              description=description,
                                              parents=[command_parser],
                                              add_help=False)

            if isinstance(command, Manager):
                self._patch_argparser(subparser)

        ## enable autocomplete only for parent parser when argcomplete is
        ## imported and it is NOT disabled in constructor
        if parent is None and ARGCOMPLETE_IMPORTED \
                and not self.disable_argcomplete:
            argcomplete.autocomplete(parser, always_complete_options=True)

        self.parser = parser
        return parser

    # def foo(self, app, *args, **kwargs):
    #     print(args)