I'm astonished that nobody has described that properties are sure ways of a descriptor class, Adam Donohue and NeilenMarais get at specifically this idea inside their posts -- that getters and setters are features and can be employed to: MaartenMaarten 23k33 gold badges5151 silver badges6969 bronze badges Include a comment https://share.evernote.com/note/ba3db039-c614-ebfa-8555-87a8070e45cc