[issue30590] str.format no longer accepts unpacked defaultdict for default values

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

There was a bug (see issue18531). It was fixed in 3.6.

Use str.format_map() for formatting with arbitrary mapping.

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nosy: +serhiy.storchaka
resolution:  -> not a bug
stage:  -> resolved
status: open -> closed

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<http://bugs.python.org/issue30590>
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