[Python-Dev] defaultdict proposal round three (original) (raw)

Alex Martelli aleaxit at gmail.com
Tue Feb 21 02:46:06 CET 2006

On Feb 20, 2006, at 5:05 PM, Raymond Hettinger wrote:

[Alex]

I see d[k]+=1 as a substantial improvement -- conceptually more direct, "I've now seen one more k than I had seen before". [Guido] Yes, I now agree. This means that I'm withdrawing proposal A (new method) and championing only B (a subclass that implements getitem() calling onmissing() and onmissing() defined in that subclass as before, calling defaultfactory 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.

OK, sounds great to me. collections.defaultdict, then?

Alex

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