Éric Araujo <mer...@netwok.org> added the comment:
> 4. I cannot come up with another typical integer value that would be
> useful, then again I've used "", [] and set() numerous times.
You can get '' with str as default factory and [] with list.
I think we agree on reclassifying this as a doc problem. Proposal:
1) Add a small example in stdtypes.rst:dict section.
2) Add examples of giving dict or int to collections.defaultdict to get {} or 0
as default value.
3) Find a way to link to that example from the index. It is not currently
indexed because there is no dict.__missing__ method, hence no method markup
that would trigger indexing.
4) Cross-link collections.rst:defaultdict, collections.rst:Counter and
stdtypes.rst:__missing__ example.
----------
components: +Documentation -Library (Lib)
nosy: +d...@python
stage: -> needs patch
title: defaultdict constructor with a concrete value -> Need example of using
__missing__
versions: +Python 2.7, Python 3.1
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<http://bugs.python.org/issue10533>
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