ENH: Enhanced the problem set building on the image handing and arrays.
Illustrated dtypes, casting and their importance along with an example
using RGBA images. Also introduce edge detection.
cubes = []for i in range(10): cubes.append(i ** 3)for i in range(100, 1000): a = i % 10 b = (i / 10) % 10 c = (i / 100) % 10 if i == cubes[a] + cubes[b] + cubes[c]: print "Armstrong Number: ", i