下表列出了所有python语言支持的标识运算符。
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：
#!/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