> class Element(object): > @staticmethod > def is_leaf(): return True > @staticmethod > def is_branch(): return False > > class Group(object): > @staticmethod > def is_leaf(): return False > @staticmethod > def is_branch(): return True > > Of course, you have to give priority to one or the other, in case an > object thinks it is both. > > if thing.is_branch(): > # Treat it like a branch > elif thing.is_leaf(): > # Treat it like a leaf > > I believe this is a simpler method than checking a single attribute > for a name.
Is it really any better than asking for class? I mean, if I need to add another class to a hierarchy which behaves differently, will it be more flexible (actually you have to add another method to every class and check for in the gui). I believe it's just the same as asking for the class, but we hide it under static methods. It's no different though. -- Filip Gruszczyński -- http://mail.python.org/mailman/listinfo/python-list
