How to add column to numpy array

Question

I am trying to add one column to the array created from recfromcsv. In this case it\'s an array: [210,8] (rows, cols).

I want to add a nint

Answer 1

I add a new column with ones to a matrix array in this way:

Z = append([[1 for _ in range(0,len(Z))]], Z.T,0).T

Maybe it is not that efficient?