[Zope] Using RegEx in Script(Python)

Hi, I wanted to know if the above can be done? What I need is a function that replaces every character of a string, that is not in [a-zA-Z1-9] with an underscore. I want to use this to automatically create an Object-Id from a title, to create a new Object. If this is not possible directly within a Script(Python), can it be done using an ExternalMethod? I suppose yes. Andreas -- You'll be called to a post requiring ability in handling groups of people.