code: def test_get_dataset_raises_error_for_empty_num_examples(self):
      dataset_config_pbtext_filename = _test_dataset_config(
          "test_get_dataset_raises_error_for_empty_num_examples.pbtxt",
          name="some_dataset_name",
          tfrecord_path="/path/to/dataset",
      )
      expected_exception_message = "The dataset in the config {} does not have a num_examples.".format(
          dataset_config_pbtext_filename
      )
      with self.assertRaisesRegex(
          ValueError, expected_exception_message
      ):
          data_providers.get_input_fn_from_dataset(
              dataset_config_pbtext_filename,
              mode=tf_estimator.ModeKeys.EVAL,
          )
  
imports: import math
  from absl.testing import absltest
  from absl.testing import parameterized
  import numpy
  import tensorflow
  from tensorflow import estimator
  from deepvariant import data_providers
  from deepvariant import dv_config
  from deepvariant import dv_constants
  from deepvariant import dv_utils
  from deepvariant import testdata
  from deepvariant.protos import deepvariant_pb2
  from third_party.nucleus.io import tfrecord
  from third_party.nucleus.testing import test_utils
  from third_party.nucleus.util import variant_utils
  from tensorflow.core.example import example_pb2
label_desc: Use image node_id 4 for calling the DataProviderTest obj's underlying member method code with example usage: obj.test_get_dataset_raises_error_for_empty_num_examples() without return types