ValueError: shapes (3,3) and (0,) not aligned: 3 (dim 1) != 0 (dim 0)
参考：https://stackoverflow.com/questions/39608421/showing-valueerror-shapes-1-3-and-1-3-not-aligned-3-dim-1-1-dim-0
The column of the first matrix and the row of the second matrix should be equal and the order should be like this only column of first matrix = row of second matrix and do not follow the below step row of first matrix = column of second matrix it will throw an error 1234567
发现两个矩阵乘的时候有个是空的
忘记返回了
记得返回值
