shell.py 文件源码

def get_subcommand_parser(self, version):
        parser = self.get_base_parser()

        self.subcommands = {}
        subparsers = parser.add_subparsers(metavar='<subcommand>',
                                           dest='subparser_name')
        try:
            submodule = importutils.import_versioned_module('iotronicclient',
                                                            version, 'shell')
        except ImportError as e:
            msg = _("Invalid client version '%(version)s'. "
                    "Major part must be one of: '%(major)s'") % {
                "version": version,
                "major": ", ".join(self.get_available_major_versions())}
            raise exceptions.UnsupportedVersion(
                _('%(message)s, error was: %(error)s') %
                {'message': msg, 'error': e})
        submodule.enhance_parser(parser, subparsers, self.subcommands)
        utils.define_commands_from_module(subparsers, self, self.subcommands)
        return parser