最后还需要执行一下（这是在cmd中）

》》》python "D:\Python\demo1.py"

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import random

def Y(X1, X2, X3):

 return 0.65 * X1 + 0.70 * X2 - 0.55 * X3 + 1.95

def Produce():

 filename = 'data.csv'

 with open(filename, 'w') as file:

  file.write('Unnamed: 0,Y,X1,X2,X3\n')

  for i in range(150):

   random.seed()

   x1 = random.random() * 10

   x2 = random.random() * 10

   x3 = random.random() * 10

   y = Y(x1, x2, x3)

   try:

    file.write(str(i)+','+ str(y)+ ',' +str(x1) + ',' + str(x2) + ',' + str(x3)  + '\n')

   except Exception as e:

    print ('Write Error')

    print (str(e))

Produce()

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