[issue19663] Not so correct error message when initializing defaultdict

[Milan Oberkirch]

Milan Oberkirch added the comment:

*ping* This is still a reasonable patch. Would be great if you can apply it :)

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nosy: +zvyn
versions: +Python 3.5, Python 3.6 -Python 3.3

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<http://bugs.python.org/issue19663>
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