[Zope-dev] Detecting object deletions

How do I detect if an object is being deleted ? I need to detect when an object is being deleted in order to perform some clean up. The deal is (excuse the highly imaginative names) : Foo inherits from Bar which inherits from Folder Foo has a __del__ method which prints 'Foo is being deleted' When an instance of Foo is deleted (via manage_delObjects) I would expect __del__ to be called at some point but nothing happens. Am I overlooking something obvious ? Thanks Robert Leftwich (running Zope 1.10.2 on win32 NT) PS This is becoming quite urgent, so if you can help, please do so !