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Sun Feb 19 04:50:07 CET 2006 · https://mail.python.org/pipermail/python-dev/2006-February/061402.html

Greg Ewing <greg.ewing at canterbury.ac.nz> wrote:
> Bengt Richter wrote:
> 
> > My guess is that realistically default_factory will be used
> > to make clean code for filling a dict, and then turning the factory
> > off if it's to be passed into unknown contexts.
> 
> This suggests that maybe the autodict behaviour shouldn't
> be part of the dict itself, but provided by a wrapper
> around the dict.
> 
> The you can fill the dict through the wrapper, and still
> have a normal dict underneath to use for other purposes.

I prefer this to changing dictionaries directly.  The actual wrapper
could sit in the collections module, ready for subclassing/replacement
of the on_missing method.

 - Josiah

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[Python-Dev] Proposal: defaultdict