python switch函數

  python并沒有提供switch語句！python可以通過字典實作switch語句的功能。

  1)首先，定義一個字典；

#!/usr/bin/python
#coding:utf8

from __future__  import division#使除非操作自動識别小數結果

def jia(x,y):
    return x+y

def jian(x,y):
    return x-y

def cheng(x,y):
    return x*y

def chu(x,y):
    return x/y

operator = {"+":jia,"-":jian,"*":cheng,"/":chu}
 
print operator["/"](3,2)

def f(x,o,y):
    print operator.get(o)(x,y)#類似switch函數操作

f(3,"/",2)#函數調用