It allows you to create and update a progress bar in a very simple way. It is made to be used in a non-object oriented programming context. You won't have to handle threads or anything.
This API is built thanks to the tkinter lib.
An illustrated tutorial is available on the wiki.
The detailed documentation is available on the wiki.
If you want to contribute, make sure to respect PEP8 and python coding conventions. And please remind that the goal of this API is to be very easy to use in a non-object oriented programming context.