Sorry, my last post was too hasty. You also had a problem calling super. It should be like this:
class parent(object): def __init__(self, l=None): if l is None: self.l=[] else: self.l=l class child(parent): def __init__(self, *args, **kwords): super(child, self).__init__(*args, **kwords) self.l.append(5) c=child() print c.l Basically: In Python 2.x "super()" doesn't know what the current class is. You have to tell it, as the first parameter. If you tell it a lie, strange things will happen. That's basically what you did. You called super(parent,...) instead of super(child,...) Have a good 2011... ;) Walter
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