python随机生成两个3*4的整数矩阵，计算两个矩阵的和

可以使用random模块中的randint函数随机生成整数，再使用嵌套的列表推导式生成两个矩阵。然后使用嵌套的for循环计算两个矩阵的和，并将结果保存到一个新的矩阵中。代码如下：

import random

# 随机生成两个3*4的整数矩阵
matrix1 = [[random.randint(1, 10) for j in range(4)] for i in range(3)]
matrix2 = [[random.randint(1, 10) for j in range(4)] for i in range(3)]

# 计算两个矩阵的和
result = [[0 for j in range(4)] for i in range(3)]
for i in range(3):
    for j in range(4):
        result[i][j] = matrix1[i][j] + matrix2[i][j]

# 打印结果
print("矩阵1：")
for row in matrix1:
    print(row)

print("矩阵2：")
for row in matrix2:
    print(row)

print("两个矩阵的和：")
for row in result:
    print(row)

运行结果如下：

矩阵1：
[1, 9, 9, 3]
[2, 10, 8, 10]
[3, 1, 10, 8]
矩阵2：
[7, 4, 8, 7]
[1, 10, 6, 8]
[9, 9, 6, 1]
两个矩阵的和：
[8, 13, 17, 10]
[3, 20, 14, 18]
[12, 10, 16, 9]