On Tue, Jul 7, 2020 at 12:01 AM Jon Ribbens via Python-list <python-list@python.org> wrote: > > On 2020-07-06, Chris Angelico <ros...@gmail.com> wrote: > > I think that even in non-strict mode, round-tripping should be > > achieved after one iteration. That is to say, anything you can > > JSON-encode will JSON-decode to something that would create the same > > encoded form. Not sure if there's anything that would violate that > > (weak) guarantee. > > I think what you're saying is, if we do: > > json1 = json.dumps(foo) > json2 = json.dumps(json.loads(json1)) > assert json1 == json2 > > the assertion should never fail (given that Python dictionaries are > ordered these days). I seems to me that should probably be true > regardless of any 'strict mode' flag - I can't immediately think of > any reason it wouldn't be.
Right. But in strict mode, the stronger assertion would hold: assert obj == json.loads(json.dumps(obj)) Also, the intermediate text would be RFC-compliant. If this cannot be done, ValueError would be raised. (Or maybe TypeError in some cases.) ChrisA -- https://mail.python.org/mailman/listinfo/python-list
