PyWeek 22 - A QuadTree collision class to use

Hi guys, I'd like to share my QuadTree collision class that I based on the one from the pygame website.
https://bitbucket.org/snippets/treehousegames/e4zer
It's faster than the original, and has a built-in simple AABB check. You can use it for static objects, but it's actually fast enough to re-create from scratch each frame for bullets, etc.