Gerhard Häring <gerhard.haering at opus-gmbh.net> wrote in message news:<slrnb2at1n.1hk.gerhard.haering at haering.opus-gmbh.net>... > Note that properties only work with new-style classes (inherited from > object). See http://python.org/2.2.2/descrintro.html for details. Thanks, this properties thing was totally unknown to me.