On Tue, Jan 08, 2019 at 01:05:09PM +1100, Chris Angelico wrote: > No, because the iteration would never happen. If the list is empty, > a[1:] is also empty, and i==a[0] will never be evaluated. So it is > safe. (But I agree that it's not instantly obvious.) Oh yeah, you're right. I overthought it too much. :)