[Python-ideas] Add pathlib.Path.write_json and pathlib.Path.read_json

[Paul Moore]

On 27 March 2017 at 17:43, Bruce Leban <bruce at leban.us> wrote:
> the ability to read one json object from the input rather than reading the
> entire input

Is this a well-defined idea? From a quick read of the JSON spec (which
is remarkably short on details of how JSON is stored in files, etc)
the only reference I can see is to a "JSON text" which is a JSON
representation of a single value. There's nothing describing how
multiple values would be stored in the same file/transmitted in the
same stream. It's not unreasonable to assume "read one object, then
read another" but without an analysis of the grammar, it's not 100%
clear if the grammar supports that (you sort of have to assume that
when you hit "the end of the object" you skip some whitespace then
start on the next - but the spec doesn't say anything like that.
Alternatively, it's just as reasonable to assume that
json.load/json.loads expect to be passed a single "JSON text" as
defined by the spec.

If the spec was clear on how multiple objects in a single stream
should be handled, then yes the json module should support that. But
without anything explicit in the spec, it's not as obvious. What do
other languages do?

Paul