python-egenix-mxproxy 2.0.6ubuntu1-5ubuntu1 (ia64 binary) in ubuntu gutsy

 mxProxy is an extension package that provides a new type that is
 suitable to implement Bastion like features without the need to use
 restricted execution environments.
 .
 The type's main features are secure data encapsulation (the hidden
 objects are not accessible from Python since they are stored in
 internal C structures), customizable attribute lookup methods and a
 cleanup protocol that helps in breaking circular references prior to
 object deletion.
 .
 The latest version adds a very interesting new feature: weak references
 which help you work with circular references in a way that doesn't
 cause memory leakage in a Python system.