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讲解Python中的标识运算符

2020-06-28 09:31Python教程网 Python

这篇文章主要介绍了讲解Python中的标识运算符,是Python学习当中的基础知识,需要的朋友可以参考下

 下表列出了所有Python语言支持的标识运算符。

讲解Python中的标识运算符

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:

?
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#!/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:

?
1
2
3
4
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

 

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