code: def test_validate_examples_in_csv_no_schema(self):
      data_location, _, options, _ = self._get_anomalous_csv_test(
          delimiter=",",
          output_column_names=False,
          generate_single_file=True,
          has_schema=False,
      )
  
      assert options.schema is None
      with self.assertRaisesRegexp(
          ValueError, "The specified stats_options.*"
      ):
          validation_lib.validate_examples_in_csv(
              data_location=data_location,
              stats_options=options,
              column_names=None,
              delimiter=",",
          )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from absl.testing import absltest
  from absl.testing import parameterized
  import pandas
  import tensorflow
  from tensorflow_data_validation.statistics import stats_options
  from tensorflow_data_validation.utils import test_util
  from tensorflow_data_validation.utils import validation_lib
  from google.protobuf import text_format
  from tensorflow_metadata.proto.v0 import schema_pb2
  from tensorflow_metadata.proto.v0 import statistics_pb2
label_desc: Use image node_id 7 for calling the ValidationLibTest obj's underlying member method code with example usage: obj.test_validate_examples_in_csv_no_schema() without return types