[Zope] External Method2

I found everything I needed, however the iteration doesn't work :-( Can somebody tell me why the functions below are not giving a result? def recursiveMethod(obj): result = [] if obj.aq_parent != None: result = recursiveMethod(obj.aq_parent) if obj.meta_type=='KBItem': result.append(obj.Title) return result Then call this method like: def GetParentNames(self): recursiveMethod(self) ------ OR -------- def GetParentNames(self): result=[] obj=self while obj.aq_parent != None: obj=obj.aq_parent if obj.meta_type=='KBItem': result.append(obj.Title) return result Thanks in advance, Tom.