[issue12657] Cannot override JSON encoding of basic type subclasses

[Éric Araujo]

Éric Araujo <merwok at netwok.org> added the comment:

A modern solution for this is to define a singledispatch function (with implementations for your custom types) and pass it as the `default` parameter to the dump functions.

(That won’t avoid the custom → dict copy, but that’s how the module works)

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue12657>
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