Help on built-in function cmp in module __builtin__:


cmp(...)

    cmp(x, y) -> integer

    

    Return negative if xy.


cmp(x, y)

Compare the two objects x and y and return an integer according to the outcome. The return value is negative if x < y, zero if x == y and strictly positive if x > y.


中文说明:比较两个对象x和y,如果x < y ,返回负数;x == y, 返回0;x > y,返回正数。


版本:该函数只有在python2中可用,而且在python2所有版本中都可用。但是在python3中该函数已经被删减掉。


>>> cmp(3,4)

-1

>>> cmp(56,34)

1

>>> cmp(a,a)

Traceback (most recent call last):

  File "", line 1, in

NameError: name 'a' is not defined

>>> cmp('a','a')

0

>>> cmp('abc','cbd')

-1