举例讲解Python中的身份运算符的使用方法

2019-11-25 17:04:10

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Python身份运算符
身份运算符用于比较两个对象的存储单元

以下实例演示了Python所有身份运算符的操作：

#!/usr/bin/pythona = 20b = 20if ( a is b ):  print "Line 1 - a and b have same identity"else:  print "Line 1 - a and b do not have same identity"if ( id(a) == id(b) ):  print "Line 2 - a and b have same identity"else:  print "Line 2 - a and b do not have same identity"b = 30if ( a is b ):  print "Line 3 - a and b have same identity"else:  print "Line 3 - a and b do not have same identity"if ( a is not b ):  print "Line 4 - a and b do not have same identity"else:  print "Line 4 - a and b have same identity"

以上实例输出结果：

Line 1 - a and b have same identityLine 2 - a and b have same identityLine 3 - a and b do not have same identityLine 4 - a and b do not have same identity

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