If there’s anywhere you’ll find a legitimate free copy, it’s from the book’s publisher. For Python Crash Course, No Starch Press is the official publisher. On rare occasions, they might offer a free ...

Package your Python applications for redistribution with one click, no compiling, and almost no additional software.

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...