Hi! I'm kind of stuck: I'm trying to write a product that is a subclass of some other class that I wrote for something else. I'm having a problem with calling the superclass's __init__ method from within the subclass's __init__ method. It works within Python but not Zope. ? I don't have any comprehensible code to show, so here's some test code I've been using: The superclass: #--supernothing.py-- class Supernothing: def __init__(self,greeting="hello"): self.greeting=greeting def sayhi(self): return self.greeting The subclasses look something like: A.Python only: #--subnothing.py -- import supernothing class Subnothing(supernothing.Supernothing): def __init__(self,greeting="I'm here!"): supernothing.Supernothing.__init__(self,greeting) B.Zope: #--nothing.py-- <Various imports, etc.> import supernothing class nothing(Acquisition.Implicit, Persistent, AccessControl.Role.RoleManager, OFS.SimpleItem.Item, supernothing.Supernothing): """Blank skeleton class. """" <Various manage settings, etc> def __init__(self,id,title,greeting): self.id=id self.title=title supernothing.Supernothing.__init__(self,greeting) # This is line 50 <bunch of other stuff> def addNothing(self,id,title,REQUEST=None,greeting='I am nothing!'): """Add a Nothing object. """ obj=nothing(id,title, greeting) self._setObject(id,obj) <the rest...> Version A works (in the Python interpreter, of course). Version B gives an error(in Zope): Traceback (innermost last): File /usr/lib/python1.5/ZPublisher/Publish.py, line 877, in publish_module File /usr/lib/python1.5/ZPublisher/Publish.py, line 590, in publish (Info: /queries/pictest/manage_addNothing) File /usr/lib/python1.5/Products/nothing/nothing.py, line 81, in addNothing (Object: Navigation) File /usr/lib/python1.5/Products/nothing/nothing.py, line 50, in __init__ (Object: RoleManager) TypeError: unbound method must be called with class instance 1st argument Can anyone see what I am missing here? TIA! John Jarvis