I have a set of (python, Folder derived) objects, which are children of a Folder derived python class. Each of these in turn has another, related python object.

/ a ab1 ab2 ab3 b1 b2 b3

When I access /a/ab1, I want b1 inserted into the acquisition hierarchy between a and ab1. I've done this with __bobo_traverse__, but that doesn't help when you access ab1 as an attribute of a, such as when using objectValues(). So I thought I would try overriding __of__, like so in the ab class:

def __of__(self, parent): wparent = self._b.__of__(parent) return Folder.Folder.__of__(self, wparent)

But that doesn't work, I get this error on the return line: Error Type: TypeError Error Value: unbound C method must be called with Acquirer 1st argument

Any ideas? I'm pretty confused.

You need to use the 'inheritedAttribute' method for an ExtensionClass to call a superclass method that you have overridden. Try the following (where 'myABClass' is the name of your class implmenting this __of__ method): def __of__(self, parent): wparent = self._b.__of__(parent) return myABClass.inheritedAttribute('__of__')(self, wparent) Hope this helps! Brian Lloyd brian@digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com