word iterator like smth

gistfile1.py

class MyIterator(object):
    def __init__(self, sentence):
        self.sentence = sentence
        self.index = 1
        self.step = 1

    def __iter__(self):
        return self

    def next(self):
        if self.index >= len(self.sentence):
            raise StopIteration

        prev, current = self.sentence[self.index - 1], self.sentence[self.index]
        self.index += self.step
        self.step = 1
        return prev, current

    def skip(self, step):
        self.step = step


sentence = 'The quick brown fox jumps over the lazy dog'.split()
iterator = MyIterator(sentence)

for prev, current in iterator:
    print "prev: %s, current: %s" % (prev, current)
    if current.startswith('o'):
        iterator.skip(2)