矩阵生成

import numpy as np
import pandas as pd

recommand_matrix_dianying = np.zeros((943,1682))
names = ['user_id','item_id','rating','timestamp']
df = pd.read_csv('u.data',sep='\t',names=names)
for i in df.itertuples():
    recommand_matrix_dianying[i[1]-1][i[2]-1] = i[3]
print(recommand_matrix_dianying)