How to remove one old python installation from a system with multiple (non-system) installations of python

Solution 1:

From python docs noting that they seem to have hard coded 2.5 instead of the current version and is not that well written

What you get after installing is a number of things:

A MacPython 2.5 folder in your Applications folder. In here you find IDLE, the development environment that is a standard part of official Python distributions; PythonLauncher, which handles double-clicking Python scripts from the Finder; and the “Build Applet” tool, which allows you to package Python scripts as standalone applications on your system.

A framework /Library/Frameworks/Python.framework, which includes the Python executable and libraries. The installer adds this location to your shell path. To uninstall MacPython, you can simply remove these three things. A symlink to the Python executable is placed in /usr/local/bin/.

so remove

/Applications/Python 3.1
/Library/Frameworks/Python.framework/Versions/3.1
/usr/local/bin/python31 (I use a different install so this might be python3.1 or similar)