As of Python 2.3a2 the only sure way of getting MacPython-OSX on your machine
is getting a source distribution and building what is called a "framework Python".
The details are in the file Mac/OSX/README.
What you get after installing is a number of things:
A MacPython-2.3 folder in your Applications
folder. In here you find the PythonIDE Integrated Development Environment;
PythonLauncher, which handles double-clicking Python scripts from
the Finder; and the Package Manager.
A fairly standard Unix commandline Python interpreter in
/usr/local/bin/python, but without the usual
/usr/local/lib/python.
A framework /Library/Frameworks/Python.framework, where
all the action really is, but which you usually do not have to be aware of.
To uninstall MacPython you can simply remove these three things.
PythonIDE contains an Apple Help Viewer book called "MacPython Help"
which you can access through its help menu. If you are completely new to
Python you should start reading the IDE introduction in that document.
If you are familiar with Python on other Unix platforms you should
read the section on running Python scripts from the Unix shell.