Thanks a lot for all your answers ! Thanks to you I resolved this problem. Here is what i've done :
[...] for (_,v) in getmembers(self): if isinstance(v,Property): st += "\t%s\n" % str(v) [...] as all the attributes I want to get are instances of Property or a subclass of Property, it does the trick. -- http://mail.python.org/mailman/listinfo/python-list