[issue16535] json encoder unable to handle decimal

[Antoine Pitrou]

Antoine Pitrou added the comment:

The patch isn't really ok, IMO. It forcibly imports the decimal module and then looks up the type there. The decimal module is a rather large one and it shouldn't get imported if it doesn't get used.

I think it would be better to rely on the __float__ special method, which would also automatically accept other numberish types such as Fraction.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16535>
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