ERROR: test_lexicon (__main__.TestLexicon)

[tmlim12345]

can someone helps please? def suite(): suite = unittest.TestSuite() suite.addTest(unittest.TestLoader().loadTestsFromTestCase(TestLexicon)) suite.addTest(unittest.TestLoader().loadTestsFromTestCase(TestFrequency)) suite.addTest(unittest.TestLoader().loadTestsFromTestCase(TestModel)) suite.addTest(unittest.TestLoader().loadTestsFromTestCase(TestMorphology)) suite.addTest(unittest.TestLoader().loadTestsFromTestCase(TestContext)) suite.addTest(unittest.TestLoader().loadTestsFromTestCase(TestEntities)) suite.addTest(unittest.TestLoader().loadTestsFromTestCase(TestParser)) suite.addTest(unittest.TestLoader().loadTestsFromTestCase(TestSentiment)) suite.addTest(unittest.TestLoader().loadTestsFromTestCase(TestMultilingual)) it looks like all the tests cannot be loaded at all.