I ran across scipy today.
I remember hearing about it back when I started programming python. I think initially I ran across it because it had some graphing abilities.
Looking at it again recently I realized this is something I really need to learn.
Specifically, it's got very strong looking distribution related functions and stats functions.
Previously, I had considered writting my own functions to do some of the same things that these moduels provide, but they provide so much more.
On to learning.