I'm using PyBrain in a project over Windows 7 and I've had not problem with this library until I had to write the trained network to a XML file. 
I tried this "from pybrain.tools.xml.networkwriter import NetworkWriter" but I got an importation error. 
Can anyone tell me if there's a requirement to get this job done? 
I tried installing the library called "lxml", because I have it installed on my linux pc, but it doesn't seem to work along side with pybrain.
PyBrain declares in it's setup.py only one required package scipy.
Scipy is a bit complex stuff and it is best installed from binaries (at least on Windows). So if you manage installing scipy, you shall make PyBrain running.
Which XML library is used for PyBrain?