发布网友 发布时间:2022-04-22 03:11
共2个回答
热心网友 时间:2024-08-19 17:12
reaCode = Noneif ( reaCode == None ): print "is null"else : print "not!"if ( reaCode is None ): print "is null"else : print "not!"reaCode = ''if ( reaCode is '' ): print "is null string"else : print "not!"reaCode = ''if ( reaCo...热心网友 时间:2024-08-19 17:20
if not str:热心网友 时间:2024-08-19 17:18
reaCode = Noneif ( reaCode == None ): print "is null"else : print "not!"if ( reaCode is None ): print "is null"else : print "not!"reaCode = ''if ( reaCode is '' ): print "is null string"else : print "not!"reaCode = ''if ( reaCo...热心网友 时间:2024-08-19 17:14
if not str: