code: def __init__(
      self,
      host,
      port,
      namespace,
      send_topic,
      receive_topic,
      src_party_id,
      src_role,
      dst_party_id,
      dst_role,
  ):
      self._host = host
      self._port = port
      self._namespace = namespace
      self._send_topic = send_topic
      self._receive_topic = receive_topic
      # self._index = 1
      self._src_party_id = src_party_id
      self._src_role = src_role
      self._dst_party_id = dst_party_id
      self._dst_role = dst_role
      self._channel = None
      self._stub = None
      LOGGER.debug(f"init, mq={self}")
  
imports: import json
  import time
  from enum import Enum
  from logging import getLogger
  from typing import Dict, List, Any
  import grpc
  import numpy
  from fate.arch.federation.backends.osx import osx_pb2
  from fate.arch.federation.backends.osx.osx_pb2_grpc import PrivateTransferTransportStub
label_desc: Use image node_id 1 to create a new MQChannel object from inherited base classes: object with example: obj = MQChannel(host, port, namespace, send_topic, receive_topic, src_party_id, src_role, dst_party_id, dst_role)