code: def setUp(self, num_workers, num_ps, use_cs=False):
      super(BaseFaultToleranceTest, self).setUp()
  
      self._cluster = (
          multi_worker_test_base.create_multi_process_cluster(
              num_workers=num_workers,
              num_ps=num_ps,
              rpc_layer="grpc",
              stream_output=True,
          )
      )
      self._cluster_def = (
          self._cluster.cluster_resolver.cluster_spec().as_dict()
      )
      self._cluster_def["chief"] = [
          "localhost:%d" % multi_worker_test_base.pick_unused_port()
      ]
      cluster_resolver = SimpleClusterResolver(
          server_lib.ClusterSpec(self._cluster_def), rpc_layer="grpc"
      )
  
      if use_cs:
          os.environ["TF_PSS_ENABLE_COORDINATION_SERVICE"] = "1"
      # The strategy's constructor would connect to the cluster.
      self.strategy = (
          parameter_server_strategy_v2.ParameterServerStrategyV2(
              cluster_resolver
          )
      )
      self.cluster_coord = cluster_coordinator.ClusterCoordinator(
          self.strategy
      )
  
      self.thread_coord = thread_coordinator.Coordinator(
          clean_stop_exception_types=[]
      )
      self.num_workers = num_workers
      self.num_ps = num_ps
  
imports: import gc
  import os
  import sys
  import threading
  import time
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.distribute import multi_worker_test_base
  from tensorflow.python.distribute import parameter_server_strategy_v2
  from tensorflow.python.distribute import test_util
  from tensorflow.python.distribute.cluster_resolver.cluster_resolver import SimpleClusterResolver
  from tensorflow.python.distribute.coordinator import cluster_coordinator
  from tensorflow.python.eager import context
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import check_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import random_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import tf_logging
  from tensorflow.python.training import coordinator
  from tensorflow.python.training import server_lib
label_desc: Use image node_id 1 for calling the BaseFaultToleranceTest obj's underlying member method code with example usage: obj.setUp(num_workers, num_ps, use_cs) without return types