"Speaker: A. Jesse Jiryu Davis

I wrote Python for years while holding mistaken notions about the Global Interpreter Lock, and I've met others in the same boat. The GIL's effect is simply this: only one thread can execute Python code at a time, while N other threads sleep or await network I/O. Let's read CPython interpreter source and try some examples to grok the GIL, and learn to write fast and threadsafe Python.

Slides can be found at: https://speakerdeck.com/pycon2017 and https://github.com/PyCon/2017slides"