How do I extend a python module? Adding new functionality to the `python-twitter` package

What are the best practices for extending an existing Python module – in this case, I want to extend the python-twitter package by adding new methods to the base API class.

I've looked at tweepy, and I like that as well; I just find python-twitter easier to understand and extend with the functionality I want.

I have the methods written already – I'm trying to figure out the most Pythonic and least disruptive way to add them into the python-twitter package module, without changing this modules’ core.