def _parse_user_flags(): """ Parses user-flags file and loads it to register user defined options. """ try: idx = list(sys.argv).index('--user-flags') user_flags_file = sys.argv[idx + 1] except (ValueError, IndexError): user_flags_file = '' if user_flags_file and os.path.isfile(user_flags_file): from ryu.utils import _import_module_file _import_module_file(user_flags_file)