Why does numpy Dot product of 2d array with 1d array produce 1d array?

Question

I try to run the code like below:

>>> import numpy as np
>>> A = np.array([[1,2], [3,4], [5,6]])
>>> A.shape
(3, 2)
>>> B         


        

Answer 1

In wiki

So (3, 2) dot with (2,1) will be (3,1)

---

How to fix

np.dot(A,B[:,None])
Out[49]: 
array([[23],
       [53],
       [83]])