Method 1 - pip

Have pip installed, e.g.:

$ easy_install pip

Check, how is your installed package named from pip point of view:

$ pip freeze

This shall list names of all packages, you have installed (and which were detected by pip). The name can be sometime long, then use just the name of the package being shown at the and after #egg=. You can also in most cases ignore the version part (whatever follows == or -).

Then uninstall the package:

$ pip uninstall package.name.you.have.found

If it asks for confirmation about removing the package, then you are lucky guy and it will be removed.

pip shall detect all packages, which were installed by pip. It shall also detect most of the packages installed via easy_install or setup.py, but this may in some rare cases fail.

Method 2 - Manually

Unix-like:

sudo python setup.py install --record files.txt
# inspect files.txt to make sure it looks ok. Then:
tr '\n' '\0' < files.txt | xargs -0 rm -f --

Windows:

python setup.py bdist_wininst
dist/foo-1.0.win32.exe