[issue24685] collections.OrderedDict collaborative subclassing

[Éric Araujo]

Éric Araujo added the comment:

FWIW I once helped a friend combine OrderedDict and defaultdict:
https://gist.github.com/merwok/11268759

The behavior can be surprising if we don’t know what Raymond said about design choices in OrderedDict, but it was not hard (in the default+ordered case) to work around.

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nosy: +eric.araujo

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<http://bugs.python.org/issue24685>
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