用python实现矩阵乘法

以下是使用Python实现矩阵乘法的示例代码：

# 定义两个矩阵
matrix1 = [[1, 2, 3],
           [4, 5, 6],
           [7, 8, 9]]

matrix2 = [[10, 11, 12],
           [13, 14, 15],
           [16, 17, 18]]

# 获取矩阵的行数和列数
rows1 = len(matrix1)
cols1 = len(matrix1[0])
rows2 = len(matrix2)
cols2 = len(matrix2[0])

# 确认两个矩阵可以相乘
if cols1 != rows2:
    print("两个矩阵无法相乘")
else:
    # 创建一个新矩阵来存储结果
    result = [[0 for j in range(cols2)] for i in range(rows1)]
    
    # 进行矩阵乘法运算
    for i in range(rows1):
        for j in range(cols2):
            for k in range(cols1):
                result[i][j] += matrix1[i][k] * matrix2[k][j]
    
    # 打印结果
    for row in result:
        print(row)

运行以上代码，将得到以下输出：

[84, 90, 96]
[201, 216, 231]
[318, 342, 366]