[Zope] Product Update Strategy

[Roché Compaan]

> ..well doing this kindof thing is exactly what I use it for: you
> write a new
> version of a product which has attributes in different places in
> classes, etc,
> and you need to update old instances.

What do you do with entirely new methods?

> Well, if you don't want them installing one more product and an
> external method,
> then you're left with __setstate__ hackery which is notoriously
> unreliable :-S

Installing a python product should be ok, but I'd like to automate
the installation of the external method because none of the users
currently have management rights.

Thanks so far
Roché