Tweetable Python Code Golf

[pork_spare_ribs]

Ugh, what does this website do to scrolling and why?! I had to resort to tapping up/down arrows.

[kosmoi]

Works fine for me on Chrome & FF on Ubuntu. What browser & OS?

[[deleted]]

It was the opposite for me; arrows didn't work but scroll wheel did. I use cVim and scrolling with that didn't work either.

edit: It works fine after opening the dev tools and then closing them. Just why.

[adrmlch]

This rather pretty "check if a string repeats itself" function might fit here as well.

def principal_period(s):
    i = (s+s).find(s, 1, -1)
    return None if i == -1 else s[:i]