[python]判断列表为空 

>>> [] is not None
True
>>> [1] is not None
True
>>> [] == None
False
>>> [1] == None
False
>>> [] == False
False
>>> [] is None
False
>>> [] == None
False
>>> not []
True
>>> not [1]
False

posted @ 2016-09-03 21:33  cn_wk  阅读(60)  评论(0)    收藏  举报