Adding columns to a structured Numpy array

Question

I have the following data in geo.dat

id  lon  lat inhab  name
 1   9.  45.   100  Ciriè
 2  10.  45.    60  Acquanegra

and I g

Answer 1

You can use np.lib.recfunctions:

import numpy.lib.recfunctions as rfn

data = rfn.append_fields(data, ['x', 'y'], [x, y])