import numpy as np a = np.arange(0, 30, 3) a # array([ 0, 3, 6, 9, 12, 15, 18, 21, 24, 27]) [a[1], a[3], a[5]] # [3, 9, 15] fancy = [1, 3, 5] a[fancy] #array([ 3, 9, 15])