Hi,
Cocos is a game library based on pyglet.
Main features:

• Defining a workflow for your game
• Creating special effects in layers
• Creating transitions between scenes
• Managing sprites

For those who will use it for this pyweek, this is our suggestion:
If you are going to use:

• pyglet 1.0, use cocos 0.1.x
• pyglet 1.1, use cocos 0.2.x

Cocos homepage: http://code.google.com/p/los-cocos/