code: def hexists(self, name, key):
          
          with self.pipe as pipe:
              return pipe.hexists(self.redis_key(name),
                                  self.memberparse.encode(key))
docs: Returns ``True`` if the field exists, ``False`` otherwise.
  
          :param name: str     the name of the redis key
          :param key: the member of the hash
          :return: Future()