python中的if not
时间: 2023-09-12 11:09:29 浏览: 44
在Python中,"if not"语句用于判断一个变量是否为False或者为None。根据引用中提到的规则,在Python中,None、False、空字符串""、0、空列表[]、空字典{}、空元组()都相当于False,因此可以使用"if not"来判断它们是否为真。根据引用中的示例,可以通过使用"not x"来判断变量x是否为False或者None。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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