Looking for a good introduction to object oriented programming with Python

[Dan Sommers]

On 2012-08-06 at 00:27:43 +0000,
Steven D'Aprano <steve+comp.lang.python at pearwood.info> wrote:

> I frequently draw diagrams to understand the relationships between my 
> classes and the problem I am trying to solve. I almost invariably use one 
> type of box and one type of arrowhead. Sometimes if I'm bored I draw 
> doodles on the diagram. If only I could remember to be consistent about 
> what doodle I draw where, I too could be an UML guru.

+1