python3 is not None

>>> True is not None
True
>>> 1 is not None
True
>>> ‘http:ww.ww.ww‘ is not None
True
>>> [1] is not None
True
>>> [] is not None
True
>>> () is not None
True
>>> ‘‘ is not None
True
>>> {} is not None
True
>>> 0 is not None
True
>>> None is not None
False

原文：https://www.cnblogs.com/bk-xiaowei/p/15208077.html