Thank you all for the answers! I'll try to give you the context in which I need to generate classes like this.
I'm developing a reusable control panel for an ISP. I have several modules (VirtualUser, SystemUser, VPS, VirtualHost, ...) and they all share the fact that you can have limits on resource consumption. for example. VPS: has limits on swap, memory, cpu and disk. SystemUser: has limits on disk and traffic. As all modules share this property of being limited I have decided to split the limit functionality in a separate module (called resources). Resources are associated dinamically with (vps, systemuser ...) through a Monitor class. So it's up to you decide what limits you are interested to put in the VPS or in the SystemUser ... So when you attach the "disk limit" to SystemUser model is necessary to create a web form for SystemUser a bit different than if you decide to have disk and traffic limits. That is what my posted code is supposed to do. Do you think that I am on the wrong way designing the control panel like this? Btw, I've seen several interesting ideas to create the class dinamically (with class factorys, MetaClass, dictionaries ..), but I have not yet clear whether this will be usefull for create the __init__ function at runtime too. Any clue on this? Many, many thanks!! :) Marc -- http://mail.python.org/mailman/listinfo/python-list