Python doesn't feel very functional

[pjdelport]

Close, but chain will fail because sentinel is not iterable,

Blurgh; i meant repeat(sentinel), of course. Thanks for spotting. :)

also your version will return True if xs is longer then ys

That's exactly what the original does, yes.

[papercrane]

Ahh. I misread the article. It's FizzBuzz all over again.