code: def _worker_idx(self):
      config_task = json.loads(os.environ["TF_CONFIG"])["task"]
      return config_task["index"]
  
imports: import ctypes
  import json
  import os
  import sys
  import threading
  import time
  import unittest
  from absl import logging
  from absl.testing import parameterized
  from tensorflow.python.distribute import combinations
  from tensorflow.python.distribute import multi_process_runner
  from tensorflow.python.distribute import multi_worker_test_base
  from tensorflow.python.eager import context
  from tensorflow.python.eager import test
label_desc: Use image node_id 1 for calling the MultiProcessRunnerTest obj's underlying member method code with example usage: obj._worker_idx() and returns: config_task