I don't know how or even whether this would be possible ootb. On one side,
I do really like the idea; on the other hand, it kind of seems like going
down a bumpy road (as you said, datetimes? filepaths?urls?). And the
de-serialization would not be easy.
What if we added a function call for the serialization, something like
json.dumps(object, method=str) (don't know if that is an option at the
moment)
On Wed, Jun 10, 2020 at 9:19 AM J. Pic <j...@yourlabs.org> wrote:
> Hi all,
>
> This is a proposal to enable uuid objects serialization / deserialization
> by the json module out of the box.
>
> UUID objects cast to string:
>
> >>> example = uuid.uuid4()
> >>> str(example)
> 'b8bcbfaa-d54f-4f33-9d7e-c91e38bb1b63'
>
> The can be casted from string:
>
> >>> example == uuid.UUID(str(example))
> True
>
> But are not serializable out of the box:
>
> >>> json.dumps(example)
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "/usr/lib/python3.8/json/__init__.py", line 231, in dumps
> return _default_encoder.encode(obj)
> File "/usr/lib/python3.8/json/encoder.py", line 199, in encode
> chunks = self.iterencode(o, _one_shot=True)
> File "/usr/lib/python3.8/json/encoder.py", line 257, in iterencode
> return _iterencode(o, 0)
> File "/usr/lib/python3.8/json/encoder.py", line 179, in default
> raise TypeError(f'Object of type {o.__class__.__name__} '
> TypeError: Object of type UUID is not JSON serializable
>
> Wouldn't it be pythonically possible to make this work out of the box,
> without going through the string typecasting ?
>
> If that discussion goes well perhaps we can also talk about datetimes ...
> I know there's nothing about datetime formats in the json specification,
> that users are free to choose, but could we choose a standard format by
> default that would just work for people who don't care about the format
> they want.
>
> Thank you in advance for your replies
>
> Have a great day
>
> --
> ∞
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