Python _find_extension_start примеры использования

Пример #1

 def test_normal_extension(self):
     self.assertEqual(4, _find_extension_start('test.zip'))

Пример #2

 def test_tar_gz(self):
     self.assertEqual(7, _find_extension_start('archive.tar.gz'))

Пример #3

 def test_no_extension(self):
     self.assertIsNone(_find_extension_start('File'))