Linux: Invalidating Cache

Here's the incantation for invalidating the linux file system cache.  Good for running performance tests when you don't want a hot cache throwing off the results.

sudo sh -c 'sync;echo 3 > /proc/sys/vm/drop_caches' 

Pymunk

"pymunk is a easy-to-use pythonic 2d physics library that can be used whenever you need 2d rigid body physics from Python."

https://github.com/viblo/pymunk