Russel Winder:
I had a quick go at doing a Python 3 version using PyTest:def provide(sourceSequence, resultLength):return (sourceSequence[i % len(sourceSequence)] for i in range(resultLength))def provideReverse(sourceSequence, resultLength): sourceLength = len(sourceSequence)return (sourceSequence[sourceLength - 1 - i % sourceLength] for i in range(resultLength))
Take also a look at itertools.cycle. Bye, bearophile
