[Zope] Getting an object indirectly in a PythonMethod

I have a python method as part of a ZClass. I want this method to return an object whose id is stored in a ZClass property. In DTML this would be as simple as <dtml-return "_[ObjNameProperty]"> I can't figure out how to do this in a python method. Things such as self.getattr(ObjNameProperty) don't seem to work at all.