test_datetime.py 文件源码

def test_pickling_base(self):
        # There's no point to pickling tzinfo objects on their own (they
        # carry no data), but they need to be picklable anyway else
        # concrete subclasses can't be pickled.
        orig = tzinfo.__new__(tzinfo)
        self.assertIs(type(orig), tzinfo)
        for pickler, unpickler, proto in pickle_choices:
            green = pickler.dumps(orig, proto)
            derived = unpickler.loads(green)
            self.assertIs(type(derived), tzinfo)