参考链接： Python程序可将两个矩阵相乘
方法一：
def matrix_multiply(matrix1,matrix2):
new_matrix = [[0 for i in range(len(matrix1))] for j in range(len(matrix1))]
for i in range(len(matrix1)):
for j in range(len(matrix1)):
for x in range(len(matrix1)):
new_matrix[i][j] = matrix1[i][x]*matrix2[x][j]
return new_matrix
matrix1 = [[1,2,3], [4,5,6], [7,8,9]]
matrix2 = [[2,2,2], [3,3,3], [4,4,4]]
new_matrix = matrix_multiply(matrix1, matrix2)
print(new_matrix) # [[20, 20, 20], [47, 47, 47], [74, 74, 74]]
方法二：
import numpy as np
matrix1 = [[1,2,3], [4,5,6], [7,8,9]]
matrix2 = [[2,2,2], [3,3,3], [4,4,4]]
print(np.dot(matrix1,matrix2))
"""
[[20 20 20]
[47 47 47]
[74 74 74]]
"""
