For what it's worth (I'm not speaking on Facebook's behalf, etc etc), I've done hundreds of interviews for Facebook and I don't think it's a red flag if you write ++ in Python.
Unless you're interviewing as a Python syntax expert or something like that.
> "There's nobody doing really creative screen savers these days, that I know of."
xscreensaver, which even runs on iOS and OS X, continues to release new modules:
Erfert Fenton's book "Art of Darkness" came with a bunch of add-on screensavers for AD. I remember the chalkboard module being particularly impressive.
Unless you're interviewing as a Python syntax expert or something like that.