code: def __init__(self, tenant, namespace, send, receive):
      self.tenant = tenant
      self.namespace = namespace
      self.send = send
      self.receive = receive
  
imports: import logging
  from typing import List, Optional
  from fate.arch.federation.api import PartyMeta
  from fate.arch.federation.message_queue import MessageQueueBasedFederation
  from ._mq_channel import DEFAULT_CLUSTER, DEFAULT_SUBSCRIPTION_NAME, DEFAULT_TENANT, MQChannel
  from ._pulsar_manager import PulsarManager
label_desc: Use image node_id 1 to create a new _TopicPair object from inherited base classes: object with example: obj = _TopicPair(tenant, namespace, send, receive)