>From "[Python-ideas] JSON encoder protocol (was Re: adding support for a "raw output" in JSON serializer)" https://mail.python.org/archives/list/python-ideas@python.org/message/5C4UHZJJ5O6CNMZADHMRSDL6FHT23FD3/
> - There's JSON5; which supports comments, trailing commas, IEEE 754 ±Infinity and NaN, [...] https://json5.org/ On Sun, Sep 13, 2020, 9:53 PM David Mertz <me...@gnosis.cx> wrote: > Yes, that is a design flaw in the stdlib. There ought to be an opt-in > switch for accepting/producing those special values, not the current > opt-out for strictness... And the misnamed parameter is 'allow_nan' whereas > it also configures 'Infinity'. > > On Sun, Sep 13, 2020, 3:16 PM Matthias Bussonnier < > bussonniermatth...@gmail.com> wrote: > >> Oh, well, but stdlib json already emit (and parse) invalid json by >> default... >> >> $ ipython >> Python 3.8.3 (default, May 19 2020, 13:54:14) >> Type 'copyright', 'credits' or 'license' for more information >> IPython 7.15.0 -- An enhanced Interactive Python. Type '?' for help. >> >> In [1]: import json >> >> In [2]: json.dumps({'a':float('nan')}) >> Out[2]: '{"a": NaN}' >> >> In [3]: json.loads(json.dumps({'a':float('nan')})) >> Out[3]: {'a': nan} >> >> NaN is not allowed in json spec, so this is wrong, though you can >> still do it... Maybe it's one of those cases where practicality beats >> purity. >> -- >> M >> >> On Sun, 13 Sep 2020 at 12:31, Brendan Barnwell <brenb...@brenbarn.net> >> wrote: >> > >> > On 2020-09-13 11:57, Christopher Barker wrote: >> > > On Sun, Sep 13, 2020 at 7:58 AM Stephen J. Turnbull >> > > <turnbull.stephen...@u.tsukuba.ac.jp >> > > <mailto:turnbull.stephen...@u.tsukuba.ac.jp>> wrote: >> > > >> > > > encoding=None: this is the important one -- json is always >> UTF-8 >> > > yes? >> > > >> > > Standard JSON is always UTF-8. Nevertheless, I'm quite sure that >> > > there's a ton of Japanese in Shift JIS, including some produced by >> > > default in Python on Windows. I'll bet the same is true of GBK >> for >> > > Chinese, and maybe even ISO-8859-1 in Europe. >> > > >> > > >> > > So what should the json lib do with these? It could have an encoding >> > > parameter with utf-8 as default. Or it could require that the user >> open >> > > the file themselves if it's not UTF-8. >> > > >> > > BTW: I noticed that json.loads() takes: >> > > >> > > Deserialize ``s`` (a ``str``, ``bytes`` or ``bytearray`` instance >> > > containing a JSON document) to a Python object. >> > > >> > > A str is an str (already Unicode, yes?) -- but for bytes, it must be >> > > assuming some encoding, presumably UTF-8, but it doesn't seem to have >> a >> > > way to specify one -- so this is already a missing feature. >> > >> > It's not a missing feature, because the JSON spec requires >> UTF-8. If >> > it's not UTF-8, it's invalid JSON. If a user wants to handle a file >> > that looks sort of like JSON but technically isn't because it's not >> > UTF-8, it's on the user to first convert the file to UTF-8 before >> > bringing JSON into the picture. >> > >> > -- >> > Brendan Barnwell >> > "Do not follow where the path may lead. Go, instead, where there is no >> > path, and leave a trail." >> > --author unknown >> > _______________________________________________ >> > Python-ideas mailing list -- python-ideas@python.org >> > To unsubscribe send an email to python-ideas-le...@python.org >> > https://mail.python.org/mailman3/lists/python-ideas.python.org/ >> > Message archived at >> https://mail.python.org/archives/list/python-ideas@python.org/message/6LLNXBX7Y2QZHDB45NFIV5IOPSUSBDQ2/ >> > Code of Conduct: http://python.org/psf/codeofconduct/ >> _______________________________________________ >> Python-ideas mailing list -- python-ideas@python.org >> To unsubscribe send an email to python-ideas-le...@python.org >> https://mail.python.org/mailman3/lists/python-ideas.python.org/ >> Message archived at >> https://mail.python.org/archives/list/python-ideas@python.org/message/R36SESX76C3KUED4Q5VFBD5SCZKKXZED/ >> Code of Conduct: http://python.org/psf/codeofconduct/ >> > _______________________________________________ > Python-ideas mailing list -- python-ideas@python.org > To unsubscribe send an email to python-ideas-le...@python.org > https://mail.python.org/mailman3/lists/python-ideas.python.org/ > Message archived at > https://mail.python.org/archives/list/python-ideas@python.org/message/RYKDIIXVWIFJBRT3WKCLDZR6FHFAQDLL/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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