New submission from Alex Gordon:
Broadly speaking, there are three main output styles for json.dump/dumps:
1. Default: json.dumps(obj)
2. Compact: json.dumps(obj, separators=(',', ':'))
3. Pretty-printing: json.dumps(obj, sort_keys=True, indent=4)
The 'compact' style is the densest, suitable if the JSON is to be sent over the
network, archived on disk, or otherwise consumed by a machine. The
pretty-printed style is for human consumption: configuration files, debugging,
etc.
Even though the compact style is often desirable, the API for producing it is
unforgiving. It's easy to accidentally write code like the following, which
silently produces invalid nonsense:
json.dumps(obj, separators=(':', ','))
I propose the addition of a new flag `compact=True`, that simply sets
`separators=(',', ':')`. e.g.
>>> obj = {"foo": 1, "bar": 2}
>>> json.dumps(obj, compact=True)
'{"foo":1,"bar":2}'
The defaults for `separators=` are good, so eventually `compact=` would
relegate `separators=` to obscurity. Setting both `compact=True` and
`separators=` at the same time should be an error.
----------
components: Library (Lib)
messages: 287663
nosy: Alex Gordon
priority: normal
severity: normal
status: open
title: Add compact=True flag to json.dump/dumps
type: enhancement
versions: Python 3.7
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue29540>
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