I wonder if there is a recommended approach to handle this issue. Suppose objects of a class C are serialized using python standard pickling. Later, suppose class C is changed, perhaps by adding a data member and a new constructor argument.
It would see the pickling protocol does not directly provide for this - but is there a recommended method? I could imagine that a class could include a class __version__ property that might be useful - although I would further expect that it would not have been defined in the original version of class C (but only as an afterthought when it became necessary). -- http://mail.python.org/mailman/listinfo/python-list
