David's talks at PyCon are all amazing. My favorite is this one: https://www.youtube.com/watch?v=MCs5OvhV9S4
Funny enough, a few months ago we decided to start a new project and we chose async Python. I had no clue how'd work so I decided to read the PEP and learn a bit more. Big was my surprise when I realized I "knew" all the fundamentals just by understanding how coroutines and generators worked low level, thanks to David's talks.
EDIT: His talks about the GIL are also super informative!
My favourite is lambda calculus in Python. It's something to save for a rainy day and follow along with. Great fun and really enlightening.
he has a way to make it lean and engaging that is very sweet
He is a natural born teacher. The kind of person whose excitement and love to share is contagious. Best of luck to him!
I saw some old code of mine that used PLY a few weeks ago and god damn is that a fine library. Fast, to the point, and a beautiful API.