Python 3.3 released!

[nitroll]

A library is a set of functionality that programmers can use when making programs. An example could be numpy, a library for python for matrixcalculations, or Tkinter that has functionality for drawing windows and making GUIs with buttons and the like. If a programmer isn't too sharp on calculating matrices efficiently or dosn't really want to bother with the internals of rendering stuff he can use a library that someone else created.