[issue18264] enum.IntEnum is not compatible with JSON serialisation

[Nick Coghlan]

Nick Coghlan added the comment:

The two "isinstance" checks that bother me are the ones for int and float. However, given that the JSON serialiser *already* includes those explicit checks, I now think it makes sense to just do the minimal fix of coercing subclasses to the base type for both of those cases, especially since such a change should be able to be ported to simplejson as well.

Anything more elaborate (including making JSON explicitly enum aware, or else offering a new encoder that supports singledispatch) should be handled in a separate issue.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18264>
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