This is awesome! Thank you so much for this, I'd been wanting to do this for a while, mostly for reasons you mentioned.
The code looks fine too, I can't see any issues so I will merge this in shortly and do a release :)
Also, feel free to contribute via Github next time! I see you have a Github account so I assume that is better for you :) I forgot to update the project link in the setup.py which I'll fix up shortly, http://github.com/nathan-hoad/python-iwlib.