Python en GNOME
Codigo (II)
Clases == Tipos (Python 2.2)

 class defaultdict(dict):
        def __init__(self, default=None):
            dict.__init__(self)
            self.default = default

        def __getitem__(self, key):
            try:
                return dict.__getitem__(self, key)
            except KeyError:
                return self.default