a = [[2, 5, 9], [3, 6, 7], [4, 8, 1]] b = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

(1) 计算 a+b

result1 = [[a[i][j] + b[i][j] for j in range(3)] for i in range(3)] print(result1) # 输出 [[3, 7, 12], [7, 11, 13], [11, 16, 10]]

(2) 计算 b 的 3 次方

result2 = [[b[i][j] ** 3 for j in range(3)] for i in range(3)] print(result2) # 输出 [[1, 8, 27], [64, 125, 216], [343, 512, 729]]