I upvoted the parent, because that syntax distinction is actually fairly giant, always having to name the class and also changing that on renames etc, is a PITA.
It is actually one of the things that annoys me most about Python, I guess this is the first thing that actually tempts me with Python 3. Damn.
Oh come on, he's saying if you do the incredibly minor syntax adjustment that all of the actual meat of the article still works in Python 2.