Use python to achieve gradient reduction

1. Today Xiaoguan will introduce the use of python to achieve gradient reduction

2. Come and show:

#theta = theta - alpha*(theta*X-Y)*X
theta = 1.0
#(alpha 阿尔法)
alpha = 0.1
#100次遍历
for i in range(100):
    #sum/3.0表示求加权平均值
    theta = theta + np.sum(alpha*(Y-dot(X,theta))*X)/3.0
print(theta)

3. Print the result:

 I hope I can help everyone, I ask you if you want a like, will you give it, thank you all.
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