I really like httplib2, but unfortunately it does not oficially support sending multipart/form-data.
So last Monday I was at work, and realized that I was needing exactly to make a http upload from within a python program, and also needed to make a session login right before.
I remember that I needed that before, but I could not find something simple and concise, yet pythonic and well tested.
So I decided to work on a proof of concept, 2 days after that, at last wednesday, I got really sick. I thought was just a simple flu, but I got even worst. Going to hospital, doctors found out I have sinusitis.
So since wednesday I am at home, having lots of damn medicines.
But the good thing is that I got time enough to hack 
So I would like to introduce you Bolacha.
You can see de docs here
There is a debian package available here
The code is available at my github page: http://github.com/gabrielfalcao/bolacha/tree/master