Some very useful Python libraries are installed using setuptools using the following procedure:
sudo python setup.py install
Unfortunately, there's no similar command to remove (or uninstall) the library, once you've decided it's not needed.
Here's a quick howto on how to uninstall these libraries, even if it's already installed. There's one caveat, you must still have the original sources:
The first step is to (re)install the library:
sudo python setup.py install --record files.txt
And then, when you want to get rid of the files:
sudo rm $(cat ./files.txt)
Don't forget to remove the old source directory.