A cross-platform windowing and multimedia library for Python. It provides a object-oriented programming approach for the development of games and applications. It runs using OpenGL accelerated graphics by default.
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Works with Windows, Linux, and OS X.
Pro 3D support
Since pyglet is so tightly woven with OpenGL it allows the support of drawing in 3D.
Pro Written in pure Python
A small advantage, but being a core Python developer, it may be the best to stick to the roots and develop with pyglet as it is able to compile using other Python interpreters.
Con Small community/popularity
There is a decent amount of documentation and API to go along with pyglet, but in terms of community support there seems to be very little.