code: def task_host_hash_indices(self, host_hash):
      resp = self._send(TaskHostHashIndicesRequest(host_hash))
      return resp.indices
  
imports: import threading
  from horovod.runner.common.service import driver_service
  from horovod.runner.common.util import network
label_desc: Use image node_id 2 for calling the SparkDriverClient obj's underlying member method code with example usage: obj.task_host_hash_indices(host_hash) and returns: resp