极简代码（四）—— 分段函数（sinc）的实现

sinc(x)=⎧⎩⎨sin(x)x,1,x≠0x=0

可转化为：

sinc(x)=sin(x)+(x==0)x+(x==0)

from math import sin
def sinc(x):
    return (sin(x) + (x == 0)) / (x + (x == 0))