gistfile1.py

if __name__ == '__main__':
    #fibonnacci sequence in a lazy list.
    @lazylist
    def fibgen(lst):
        yield 0
        yield 1
        for a, b in itertools.izip(lst, lst[1:]):
            yield a + b

    fibs = fibgen() #now fibs can be indexed or iterated over as if it were
                    #an infinitely long list containing the fibonnaci sequence