Diagonally Replicating elements along numpy array

Question

Suppose I had an array like this:

 array([[0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
        [0, 0, 3, 3, 0, 0, 0, 0, 0, 0],