And yet, I know python and have 15 years of professional experience coding, and (in the limited time I wanted to spend on it), I still don't exactly know what h

And yet, I know python and have 15 years of professional experience coding, and (in the limited time I wanted to spend on it), I still don't exactly know what he was trying to accomplish. So congrats if you got it, but I'm sticking with my claim that it's fairly non-obvious. I understand that it's pulling out the last three elements. I have no idea why it's pulling out the last three elements, what purpose that serves and why it's desirable. If those elements were placed in a well named variable, I suspect it'd give a hint as to why the code is doing that. Alas.