code: def testNoPartition(self):
      empty = partition_utils.NO_PARTITION
      self.assertEqual(empty.dimensions, ())
      self.assertEqual(empty.partial([]), ())
      self.assertFalse(empty)
  
imports: import tensorflow
  from tfx.orchestration.portable.input_resolution import partition_utils
label_desc: Use image node_id 2 for calling the PartitionUtilsTest obj's underlying member method code with example usage: obj.testNoPartition() without return types