code: def test_not_calling_correct_main(self):
      def simple_func():
          return "foobar"
  
      with self.assertRaisesRegex(
          multi_process_runner.NotInitializedError,
          "`multi_process_runner` is not initialized.",
      ):
          multi_process_runner.run(
              simple_func,
              multi_worker_test_base.create_cluster_spec(num_workers=1),
          )
  
imports: from tensorflow.python.distribute import multi_process_runner
  from tensorflow.python.distribute import multi_worker_test_base
  from tensorflow.python.eager import test
label_desc: Use image node_id 1 for calling the MultiProcessRunnerNoInitTest obj's underlying member method code with example usage: obj.test_not_calling_correct_main() and returns: str