if you want to revert, you can modify your .bash_profile or other login shell initialization to fix $PATH to not add "/Library/Frameworks/Python.framework/Versions/2.5/bin" to $PATH and/or to not have /usr/local/bin appear before /usr/bin on $PATH.
If you want to permanently remove the python.org installed version, paste the following lines up to and including the chmod into a posix- compatible shell:
tmpfile=/tmp/generate_file_list
cat <<"NOEXPAND" > "${tmpfile}"
#!/bin/sh
version="${1:-"2.5"}"
file -h /usr/local/bin/* | grep \
"symbolic link to ../../../Library/Frameworks/Python.framework/"\
"Versions/${version}" | cut -d : -f 1
echo "/Library/Frameworks/Python.framework/Versions/${version}"
echo "/Applications/Python ${version}"
set -- Applications Documentation Framework ProfileChanges \
SystemFixes UnixTools
for package do
echo "/Library/Receipts/Python${package}-${version}.pkg"
done
NOEXPAND
chmod ug+x ${tmpfile}
...excripted from troubleshooting question on python website