1081     def add_parser(self, name, **kwargs):  argument
1083         if kwargs.get('prog') is None:
1084             kwargs['prog'] = '%s %s' % (self._prog_prefix, name)
1087         if 'help' in kwargs:
1088             help = kwargs.pop('help')
1093         parser = self._parser_class(**kwargs)
1174     def __init__(self, **kwargs):  argument
1175         for name in kwargs:
1176             setattr(self, name, kwargs[name])
1252     def set_defaults(self, **kwargs):  argument
1253         self._defaults.update(kwargs)
1258             if action.dest in kwargs:
1259                 action.default = kwargs[action.dest]
1271     def add_argument(self, *args, **kwargs):  argument
1282             if args and 'dest' in kwargs:
1284             kwargs = self._get_positional_kwargs(*args, **kwargs)
1288             kwargs = self._get_optional_kwargs(*args, **kwargs)
1291         if 'default' not in kwargs:
1292             dest = kwargs['dest']
1294                 kwargs['default'] = self._defaults[dest]
1296                 kwargs['default'] = self.argument_default
1299         action_class = self._pop_action_class(kwargs)
1302         action = action_class(**kwargs)
1311     def add_argument_group(self, *args, **kwargs):  argument
1312         group = _ArgumentGroup(self, *args, **kwargs)
1316     def add_mutually_exclusive_group(self, **kwargs):  argument
1317         group = _MutuallyExclusiveGroup(self, **kwargs)
1385     def _get_positional_kwargs(self, dest, **kwargs):  argument
1387         if 'required' in kwargs:
1393         if kwargs.get('nargs') not in [OPTIONAL, ZERO_OR_MORE]:
1394             kwargs['required'] = True
1395         if kwargs.get('nargs') == ZERO_OR_MORE and 'default' not in kwargs:
1396             kwargs['required'] = True
1399         return dict(kwargs, dest=dest, option_strings=[])
1401     def _get_optional_kwargs(self, *args, **kwargs):  argument
1421         dest = kwargs.pop('dest', None)
1434         return dict(kwargs, dest=dest, option_strings=option_strings)
1436     def _pop_action_class(self, kwargs, default=None):  argument
1437         action = kwargs.pop('action', default)
1487     def __init__(self, container, title=None, description=None, **kwargs):  argument
1489         update = kwargs.setdefault
1494         super_init(description=description, **kwargs)
1646     def add_subparsers(self, **kwargs):  argument
1651         kwargs.setdefault('parser_class', type(self))
1653         if 'title' in kwargs or 'description' in kwargs:
1654             title = _(kwargs.pop('title', 'subcommands'))
1655             description = _(kwargs.pop('description', None))
1662         if kwargs.get('prog') is None:
1667             kwargs['prog'] = formatter.format_help().strip()
1670         parsers_class = self._pop_action_class(kwargs, 'parsers')
1671         action = parsers_class(option_strings=[], **kwargs)