Matrix indexing in Numpy

Question

I was growing confused during the development of a small Python script involving matrix operations, so I fired up a shell to play around with a toy example and develop a bet

Answer 1

Imagine you have the following

>> A = np.array([[1,2,3,4],[5,6,7,8],[9,10,11,12]]) 

If you want to get the second column value, use the following:

>> A.T[1]
array([ 2,  6, 10])