[Python-Dev] Python 2.6 BaseException.message deprecation, really needed?

[Fred L. Drake, Jr.]

On Saturday 07 July 2007, Gustavo Carneiro wrote:
 > In PyGObject we want to use a 'message' attribute in an exception defined
 > by us.  The name 'message' comes from a C API, therefore we would like to
 > keep it for easier mapping between C and Python APIs.  Why does Python
 > have to deprecate this attribute?

It can be deprecated for BaseException without it being deprecated for your 
exception.  You'll need to define a property that overrides the property in 
BaseException; something like this in Python (not tested):

  class MyException(Exception):

      _message = None

      @apply
      def message():

          def get(self):
              return self._message

          def set(self, value):
              self._message = value

          return property(get, set)

I think your use case is entirely reasonable, and can be handled readily.


  -Fred

-- 
Fred L. Drake, Jr.   <fdrake at acm.org>