The one thing I'm not thrilled by in mxProxy is that a call to CheckWeakReferences() is needed before an object is cleaned up. I guess this boils down to the same problem I had with my weak reference scheme: you somehow want the Python core to tell the proxy stuff that the object can be cleaned up (although the details are different: in my scheme this would be triggered by refcount==0 and in mxProxy by refcount==1). And because objects are created and destroyed in Python at a tremendous rate you don't want to do this call for every object, only if you have a hint that the object has a weak reference (or a proxy). -- Jack Jansen | ++++ stop the execution of Mumia Abu-Jamal ++++ Jack.Jansen@oratrix.com | ++++ if you agree copy these lines to your sig ++++ www.oratrix.nl/~jack | see http://www.xs4all.nl/~tank/spg-l/sigaction.htm