[Python-Dev] defaultdict proposal round three

"Martin v. Löwis" martin at v.loewis.de
Tue Feb 21 22:25:49 CET 2006

Raymond Hettinger wrote:
>>Yes, I now agree. This means that I'm withdrawing proposal A (new
>>method) and championing only B (a subclass that implements
>>__getitem__() calling on_missing() and on_missing() defined in that
>>subclass as before, calling default_factory unless it's None). I don't
>>think this crisis is big enough to need *two* solutions, and this
>>example shows B's superiority over A.
> FWIW, I'm happy with the proposal and think it is a nice addition to Py2.5.

I agree. I would have preferred if dict itself was modified, but after
ruling out changes to dict.__getitem__, d[k]+=1 is too important to
not support it.


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