Thousand Parsec Python TP Client library is used by all the more complicated python applications to share common code.
You do not require this library if you are using a prebuild binary or the inplace version of the client.
Thousand Parsec is a framework for turn based space empire building games.
Some examples of games which Thousand Parsec draws ideas from are, Stars!, VGA Planets, Master of Orion and Galactic Civilizations. These games are often called 4 X's from the main phases found in the games, eXplore, eXpand, eXploit and eXterminate. If you haven't heard of them, other games which are a bit similar include, Civilisation, Hero's of Might and Magic and Starcraft.
Thousand Parsec includes everything you need to play any of the currently running games, set up your own game using already designed games, and building your own space empire building game.