code: def test_other_classes_invalid_class_ind(self):
      with self.assertRaises(Exception) as context:
          utils.other_classes(5, 8)
      self.assertTrue(context.exception)
  
file_path: cleverhans/cleverhans_v3.1.0/tests_tf/test_utils.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import unittest
  import numpy
  from cleverhans import utils
  from cleverhans.utils_keras import cnn_model
  from cleverhans.utils_keras import KerasModelWrapper
label_desc: Use image node_id 6 for calling the TestUtils obj's underlying member method code with example usage: obj.test_other_classes_invalid_class_ind() without return types