Hi everybody,
Here's a tool that will let you install and switch multiple versions of python in one system. It's compatible with Linux and OSX. It's inspired by RVM (similar ruby tool). You can read more about it here.
Also, if you are on a mac and don't want to install Python Brew, you can use Homebrew.
Here's the home page with instructions for installing Homebrew.
Enjoy!!
--Axel Rivera