Python – How to Use Python 3 When Default is Python 2.7

I think you probably have two options, barring a reinstallation of 2.7, which might be the easiest thing to do.

You can include the following first line in every Python script:

#!/usr/local/bin/python2.6

Change the path to reflect the version and location of the Python you would like to use.

Alternately you could create a bash alias like:

alias python = '/path/to/pythonversion'

I would go with the first version myself.

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).