On Sun, Aug 11, 2019 at 5:12 PM David Shawley <daveshaw...@gmail.com> wrote:
> 1) Should JSONEncoder (the class underlying json.dumps) natively > support decimal.Decimal, and if so, can it avoid importing that module > unnecessarily? > > I think yes on both counts :-) > 2) Should there be a protocol obj.__json__() to return a string > representation of an object for direct insertion into a JSON file? > > I'm inclined towards the protocol, since there are protocols for > various other encoders (eg deepcopy, pickle), and it avoids the > problem of json importing decimal. It can also be implemented entirely > as a third-party patch, although you'd need to subclass Decimal to add > that method. > > I think if we ARE going to extend json to allow more flexibility, yes, a protocol would be a good way to do it. But it makes me nervous -- I think the goal of the json module is to produce valid json, and nothing else. Opening up a protocol would allow users to fairly easily, and maybe inadvertently, create invalid JSON. I'm not sure there are compelling use cases that make that worth it. -CHB -- Christopher Barker, PhD Python Language Consulting - Teaching - Scientific Software Development - Desktop GUI and Web Development - wxPython, numpy, scipy, Cython
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