讲解Python中的标识运算符

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我是靠谱客的博主等待小松鼠，最近开发中收集的这篇文章主要介绍讲解Python中的标识运算符，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

下表列出了所有Python语言支持的标识运算符。

2015514101018679.jpg (589×219)

示例：

试试下面的例子就明白了所有Python编程语言提供的标识运算符：

#!/usr/bin/python

a = 20
b = 20

if ( 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 = 30
if ( 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"

当执行上面的程序它会产生以下结果：

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