Python: adding index as new column to 2D array

Suppose I have np.array like below

dat = array([[ 0,  1,  0],  [ 1,  0,  0],  [0, 0, 1]]  )  

What I want to do is that adding the (index of row + 1) as a new column to this array, which is like

newdat = array([[ 0,  1,  0, 1],  [ 1,  0,  0, 2],  [0, 0, 1, 3]]  )  

How should I achieve this.

https://stackoverflow.com/questions/65745624/python-adding-index-as-new-column-to-2d-array January 16, 2021 at 09:25AM