test_types.py 文件源码

def test_attrdel(self):
        ns1 = types.SimpleNamespace()
        ns2 = types.SimpleNamespace(x=1, y=2, w=3)

        with self.assertRaises(AttributeError):
            del ns1.spam
        with self.assertRaises(AttributeError):
            del ns2.spam

        del ns2.y
        self.assertEqual(vars(ns2), dict(w=3, x=1))
        ns2.y = 'spam'
        self.assertEqual(vars(ns2), dict(w=3, x=1, y='spam'))
        del ns2.y
        self.assertEqual(vars(ns2), dict(w=3, x=1))

        ns1.spam = 5
        self.assertEqual(vars(ns1), dict(spam=5))
        del ns1.spam
        self.assertEqual(vars(ns1), {})