There are many python libraries available for controlling the mouse/keyboard. Here are a few I've used or heard of:

Autopy: https://github.com/msanders/autopy

PyMouse: http://code.google.com/p/pymouse/wiki/Documentation

Dogtail: https://fedorahosted.org/dogtail/

If you're on Windows, I believe win32api / win32con also can work.

It isn't used in this case, but Autohotkey is quite a popular scripting/macro language that allows you to simulate mouse and keyboard use programmatically. It's cross platform, and can be run straight through the interpreter or compiled into native executables on many platforms by bundling the interpreter.