Hello, I don't understand property behawiour in code bellow (I am not experienced programmmer, so I could missed something obivious). In example bellow: "list_items1" works as I expected - it returns list of objects from catalog but "list_items2" fails - I get Attribute Error or if it finds "items" through acquisition it returns this object. But, if I uncomment line "return [1,2,3]" in code below, then both functions return the same value - list [1,2,3]. Search of "catalog" by acquisition messes with class attribute lookup? <code> class Storage (SimpleItem): """ see IStorage interface """ implements(IStorage) title = FieldProperty(IStorage['title']) description = FieldProperty(IStorage['description']) def _get_items(self): """ Return list of items in storage (unsorted). """ #return [1,2,3] return [x.getObject() for x in self.catalog(storage=self.title)] items = property(_get_items) def list_items1(self): """ test """ return self._get_items() def list_items2(self): """ test """ return self.items </code> Piotr Chamera