code: def test_map_partitions_with_index(self):
      """Test RDDBarrier.mapPartitionsWithIndex"""
      rdd = self.sc.parallelize(range(12), 4)
      self.assertFalse(rdd._is_barrier())
  
      def f(index, iterator):
          yield index
  
      rdd1 = rdd.barrier().mapPartitionsWithIndex(f)
      self.assertTrue(rdd1._is_barrier())
      self.assertEqual(rdd1.collect(), [0, 1, 2, 3])
  
imports: from pyspark.testing.utils import ReusedPySparkTestCase
label_desc: Use image node_id 2 for calling the RDDBarrierTests obj's underlying member method code with example usage: obj.test_map_partitions_with_index() without return types