code: def __call__(self, key: str) -> "_KeyedParty":
      return _KeyedParty(self, key)
  
imports: import logging
  import typing
  from typing import List, Tuple, TypeVar, Union
  from fate.arch.federation.api import PartyMeta, TableRemotePersistentPickler, TableRemotePersistentUnpickler
  from fate.arch.trace import federation_get_timer, federation_remote_timer
  from ._namespace import NS
label_desc: Use image node_id 2 for calling the Party obj's underlying member method code with example usage: obj.__call__(key) and returns: _KeyedParty