Py(thon)EnemyTerritory is a server-side plugin based on the existing mod ETPub 0.9.1. This plugin allows you to use the Python programming language as a scripting language.
PyET resembles the LUA support which is included in some mods like ETPro. The advantages of using Python instead of LUA are that it's much better documented, easy to use and rich in libraries.
Now the plugin is designed to be runnable on every ET mod.
DL Link > PyET-download
Official website > http://www.python.org/
Official documentation > http://docs.python.org/3/
How To > https://github.com
DownLoad link > http://sourceforge.net
Script example > https://github.com
Source: Wolfenstein4ever.de