eval转换函数

这个用法比较特殊,记录一下:

from math import *
user_func = raw_input("type a function: y = ")
for x in range(1,10):
    print "x = ", x , ", y = ", eval(user_func)    

输出结果:

type a function: y = x+100
x =  1 , y =  101
x =  2 , y =  102
x =  3 , y =  103
x =  4 , y =  104
x =  5 , y =  105
x =  6 , y =  106
x =  7 , y =  107
x =  8 , y =  108
x =  9 , y =  109