code: def test_classes_have_correct_attributes(self):
      language_classes = languages.get_language_classes()
  
      for name, obj in language_classes:
          self.assertTrue(inspect.isclass(obj))
          self.assertTrue(hasattr(obj, "ISO_639"))
          self.assertTrue(hasattr(obj, "ISO_639_1"))
          self.assertTrue(hasattr(obj, "ENGLISH_NAME"))
          self.assertEqual(name, obj.ISO_639.upper())
  
      self.assertEqual(len(language_classes), 402)
  
imports: import inspect
  from chatterbot import languages
  from unittest import TestCase
label_desc: Use image node_id 1 for calling the LanguageClassTests obj's underlying member method code with example usage: obj.test_classes_have_correct_attributes() without return types