code: def request(self, service, hostport=None, **kwargs):
          
          return PeerClientOperation(
              peer_group=self,
              service=service,
              hostport=hostport,
              **kwargs)
docs: Initiate a new request through this PeerGroup.
  
          :param hostport:
              If specified, requests will be sent to the specific host.
              Otherwise, a known peer will be picked at random.
          :param service:
              Name of the service being called. Defaults to an empty string.