Making an iterable from __getitem__

noway.py

# http://lucumr.pocoo.org/2011/7/9/python-and-pola/

class NoWay(object):

    def __getitem__(self, key):
        if key == 0:
            return 'a'
        if key == 1:
            return 'b'
        if key == 'apple':
            return 'c'
        if key == 3:
            return 'd'
        raise IndexError('No key: %s' % key)

n = NoWay()
for i in n:
    print i