[issue34529] add the option for json.dumps to return newline delimited json

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

This format is known as JSON Lines: http://jsonlines.org/. Its support in the user code is trivial -- just one or two lines of code.

Writing:

    for item in items:
        json.dump(item, file)

or

    jsondata = ''.join(json.dumps(item) for item in items)

Reading:

    items = [json.loads(line) for line in file]

or

    items = [json.loads(line) for line in jsondata.splitlines()]

See also issue31553 and issue34393. I think all these propositions should be rejected.

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nosy: +serhiy.storchaka

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<https://bugs.python.org/issue34529>
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