[Python-Dev] Python 2.3a1's mandatory use of cyclic GC causes existing applications to fail

[Kevin Jacobs]

On Thu, 6 Feb 2003, Guido van Rossum wrote:
> Can you suggest a concrete syntax to do this?  Maybe setting __slots__
> to a dictionary mapping names to type specifiers would do it -- and it
> would even be backwards compatible: currently, if __slots__ is a dict,
> its keys are used as slot names and its values are ignored, by virtue
> of the way the type constructor iterates over __slots__.

I already use __slots__ assigned to dictionaries where the values are not
ignored.  They are interpreted by a metaclass to apply type conversion
operators and type/value enforcement predicates to slots.  I hope that
future versions of Python will not tread on this feature.  (Though I'd
happily trade in this feature in exchange for having __slots__ be immutable)

Meta-regards,
-Kevin

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Kevin Jacobs
The OPAL Group - Enterprise Systems Architect
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