def build_option_parser(self, description, version):
        parser = argparse.ArgumentParser(
            description=description,
            add_help=False, )
        parser.add_argument(
            '--version',
            action='version',
            version=__version__, )
        parser.add_argument(
            '-v', '--verbose', '--debug',
            action='count',
            dest='verbose_level',
            default=self.DEFAULT_VERBOSE_LEVEL,
            help=_('Increase verbosity of output and show tracebacks on'
                   ' errors. You can repeat this option.'))
        parser.add_argument(
            '-q', '--quiet',
            action='store_const',
            dest='verbose_level',
            const=0,
            help=_('Suppress output except warnings and errors.'))
        parser.add_argument(
            '-h', '--help',
            action=HelpAction,
            nargs=0,
            default=self,  # tricky
            help=_("Show this help message and exit."))
        parser.add_argument(
            '-r', '--retries',
            metavar="NUM",
            type=check_non_negative_int,
            default=0,
            help=_("How many times the request to the Neutron server should "
                   "be retried if it fails."))
        # FIXME(bklei): this method should come from keystoneauth1
        self._append_global_identity_args(parser)

        return parser
Return an argparse option parser for this application.
dataset/ETHPy150Open openstack/python-neutronclient/neutronclient/shell.py/NeutronShell.build_option_parser