S T E P H E N H U C K E R . C O M

For an excellent and concise version of this please read http://dev.fprimex.com/learning-python/installing-python-on-mac
It also includes extremely easy instructions on installing the excellent SPE Python editor.

With Python when you want to install a package on the Internet you can either manually install it or use the Python Package Index.

The Python Package Index is a repository of software for [...]