test_sys.py 文件源码

def test_implementation(self):
        # This test applies to all implementations equally.

        levels = {'alpha': 0xA, 'beta': 0xB, 'candidate': 0xC, 'final': 0xF}

        self.assertTrue(hasattr(sys.implementation, 'name'))
        self.assertTrue(hasattr(sys.implementation, 'version'))
        self.assertTrue(hasattr(sys.implementation, 'hexversion'))
        self.assertTrue(hasattr(sys.implementation, 'cache_tag'))

        version = sys.implementation.version
        self.assertEqual(version[:2], (version.major, version.minor))

        hexversion = (version.major << 24 | version.minor << 16 |
                      version.micro << 8 | levels[version.releaselevel] << 4 |
                      version.serial << 0)
        self.assertEqual(sys.implementation.hexversion, hexversion)

        # PEP 421 requires that .name be lower case.
        self.assertEqual(sys.implementation.name,
                         sys.implementation.name.lower())