I see your point. Looking again at my metaclass implementation and comparing it with your abstract class + inheritance approach it turns out that the latter is definetively more straightforward, easier to maintain and all in all more pythonic.
Sorry, but being an OOP newbie put me in the position of overcomplexifing(tm) things a little bit. I'll be back soon with other (I hope less silly) questions. ;-p Thanks for all your suggestions, Andrea -- http://mail.python.org/mailman/listinfo/python-list
