OO on python real life tutorial?

[filippo]

Hello,

I coded my +10k lines app using Perl/Tk. It is something like a hotel
software manager, it has a bunch of windows to manage the arrivals,
bills etc etc. I want to port this on Python/WxPython but I'd like to
get benefit of python, not just doing a row by row raw porting.

My problem is that I cannot figure out how OO could be useful in my
case. Is there a OO tutorial out there to help me?

Thanks,

Filippo