@author jackzhenguo
@desc
@date 2019/5/3random模块中的gauss(u,sigma)生成均值为u, 标准差为sigma的满足高斯分布的值，如下生成10个二维坐标点，样本误差(y-2*x-1)满足均值为0，标准差为1的高斯分布：
from random import gauss
x = range(10)
y = [2*xi+1+gauss(0,1) for xi in x]
points = list(zip(x,y))
### 10个二维点：
[(0, -0.86789025305992),
(1, 4.738439437453464),
(2, 5.190278040856102),
(3, 8.05270893133576),
(4, 9.979481700775292),
(5, 11.960781766216384),
(6, 13.025427054303737),
(7, 14.02384035204836),
(8, 15.33755823101161),
(9, 17.565074449028497)]