[issue12657] Cannot override JSON encoding of basic type subclasses

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

I'm working on a large patch which will include also the fix for this issue. This is a significant change and it can affect behavior and performance of existing code, so it can be made only in new version.

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assignee:  -> serhiy.storchaka
nosy: +serhiy.storchaka
versions: +Python 3.8 -Python 2.7, Python 3.4

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<https://bugs.python.org/issue12657>
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