Uninstall python 2.7 from 10.8
if you can use pkgutil on a file you know for sure came from the python 2.7 you installed you can do

pkgutil --file-info /path/to/the/file


Copy/paste the pkgid in

pkgutil --file pkgid


That will spit out a list of files that came with python 2.7 -- you can now go ahead and remove them (with all due care not to remove any unrelated file in the same directories etc).