I've seen that before, but I still have no clue what this is supposed to do, and the website doesn't really explain anything. Could you please elaborate on what this device is actually for?
It's a device, mostly intended for research purposes, that proxies the USB protocol back up to a python program/library.
Basically you plug in USB at one end, at the other end you can script the USB protocol with python, emulating any USB device you want to (or that you can write the code for).