map()函数的使用技巧

num = [10,20,40,80,160]
lst = [2,4,6,8,10]
def mul3(a):
    return a*3
print (list(map(mul3,num)))

def atob(a, b):
    return a + 1.0/b
print (list(map(atob, num, lst)))

[30, 60, 120, 240, 480]
[10.5, 20.25, 40.166666666666664, 80.125, 160.1]