[Split a list into parts based on a set of indexes in Python] #python

example

indexes = [5, 12, 17]
list = range(20)

part1 = list[:5]
part2 = list[5:12]
part3 = list[12:17]
part4 = list[17:]

from itertools import izip, chain
def partition(alist, indices):
    pairs = izip(chain([0], indices), chain(indices, [None]))
    return (alist[i:j] for i, j in pairs)