On Friday 24 August 2001 23:46, Dieter Maurer wrote:
self._attributes = {'value':'','html':'','alignment':''}
From here on "self._attributes" is no longer a PersistentMapping but a normal Python dictionary. Internal modifications do not trigger the persistence machinery. They would, if "_attributes" were still a PersistentMapping....
Doh - didn't think of that... Anyway - I'm lying on the coach with the flu right now so my brain is even duller than usual :-) Something I don't quite understand about the python classes: Say you have an instance of a class MyClass with attributes myattr1 and myattr2; then you change the class definition for MyClass adding myattr3. If attributes are stored in dictionary __dict__ isn't it possible simply to do: def __getattr__(self, name): # or maybe __setstate__(self): if not self.hasattr(name): # add attribute name self.__dict__[name] = "" Shouldn't this add the attribute to the class instance? -- Regards, Thomas Olsen http://www.tanghus.dk