Which Version of Python Do You Already Have Installed on Mac OS X?
Open the Terminal.app and type
which python, and on a fresh install of Snow Leopard you should see:
This is a symlink that points to your actual Python installation.
cd /usr/bin; ls -l python2.6, and the output should be something like:
lrwx-xr-x 1 root wheel 75 Oct 7 23:24 python2.6 -> ../../System/Library/Frameworks/Python.framework/Versions/2.6/bin/Python2.6
Now open an interactive interpreter session:
Python 2.61 (r261:67515, Feb 11 2010, 00:51:29) [GCC 4.2.1 (Apple Inc. build 5646)] on darwin Type "help", "copyright", "credits", or "license" for more information. >>>