From scripting to object-oriented Python programming
"From scripting to object-oriented Python programming" is another great article from the IBM DeveloperWorks series. It covers the transition from procedural programming in PHP or bash to procedural, object oriented and functional programming in Python.
It does it through a simple disk-monitoring example and I think is quite a good read. For you who are on vacation, like r0sk or MarcosBL, there is no excuse and it could be the perfect point to begin reading and learning about such a great programming language.
Ah!, in my oppinion, the best approach is the object-oriented one (talking about the example in that article of course).