code: def test_distribute_dataset(self):
      # We can only verify the single worker/process case in OSS for now.
      dataset = tf.data.Dataset.range(8)
      distribution = distribution_lib.DataParallel(
          device_mesh=self.device_mesh
      )
      distributed_dataset = distribution.distribute_dataset(dataset)
      self.assertIs(dataset, distributed_dataset)
  
imports: import os
  from unittest import mock
  import numpy
  import pytest
  import tensorflow
  from keras import backend
  from keras import testing
  from keras.backend import distribution_lib
  from keras.distribution import distribution_lib
label_desc: Use image node_id 8 for calling the DataParallelDistributionTest obj's underlying member method code with example usage: obj.test_distribute_dataset() without return types