code: def setUp(self):
      super(DatasetsTest, self).setUp()
      self._coord = server_lib.Server.create_local_server()
      self._worker = server_lib.Server.create_local_server()
  
      self._cluster_def = cluster_pb2.ClusterDef()
      worker_job = self._cluster_def.job.add()
      worker_job.name = "worker"
      worker_job.tasks[0] = self._worker.target[len("grpc://") :]
      coord_job = self._cluster_def.job.add()
      coord_job.name = "coordinator"
      coord_job.tasks[0] = self._coord.target[len("grpc://") :]
  
      session_config = config_pb2.ConfigProto(
          cluster_def=self._cluster_def
      )
  
      self._sess = session.Session(
          self._worker.target, config=session_config
      )
      self._worker_device = "/job:" + worker_job.name
  
imports: import os
  from tensorflow.core.protobuf import cluster_pb2
  from tensorflow.core.protobuf import config_pb2
  from tensorflow.python.client import session
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.ops import readers
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.lib.io import python_io
  from tensorflow.python.platform import test
  from tensorflow.python.tpu import datasets
  from tensorflow.python.training import server_lib
  from tensorflow.python.util import compat
label_desc: Use image node_id 1 for calling the DatasetsTest obj's underlying member method code with example usage: obj.setUp() without return types