numpy怎么进行矩阵乘法

numpy.dot或者numpy.matmul都可以

>>> a
array([[1, 2],
       [3, 4]])
>>> b
array([[1, 2, 3],
       [1, 2, 1]])
# numpy.dot
>>> np.dot(a, b)
array([[ 3,  6,  5],
       [ 7, 14, 13]])
# numpy.matmul
>>> np.matmul(a, b)
array([[ 3,  6,  5],
       [ 7, 14, 13]])