Color in json.tool CLI

[raztd]

Feature or enhancement

Proposal:

apologies if this is not the right place to ask for enhancement requests. since python3.13 added support for colorization in repl, i was wondering if some basic colorization could be added for the python's cli json tool? jq[0] does this, the keys are bolded and have a different color from the values.

if this gets implemented i think a lot of people will be happy to just use python and not have to install yet another library to fulfill their needs :-)

[0] https://static1.howtogeekimages.com/wordpress/wp-content/uploads/2020/01/5-7.png

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-131952: Add color to the json CLI #132126

[ZeroIntensity]

cc @hugovk

[sobolevn]

I think that adding colors by default can possibly break piping on some shells / systems. But, I am not 100% sure.

Like get_json | python -m json.tool | expects_json_text

[hugovk]

By default, the _colorize module does check if we're in a tty before enabling colour:

cpython/Lib/_colorize.py

Lines 109 to 112 in 3b3720f

	try:
	return os.isatty(file.fileno())
	except io.UnsupportedOperation:
	return hasattr(file, "isatty") and file.isatty()

Compare the output of python3.14 -m calendar and python3.14 -m calendar | cat

[ZeroIntensity]

Compare the output of python3.14 -m calendar

Speaking of which, is that extra highlighted space before the 1 supposed to be there?

The assymetry looks a little funky to me.

[Eclips4]

Speaking of which, is that extra highlighted space before the 1 supposed to be there?

The assymetry looks a little funky to me.

I guess so. At least so-called cal does the same:

[srinivasreddy]

asymmetry happens on MacOS too.

[hugovk]

The highlight includes the unprinted 0 prefix.

[nineteendo]

Like this?

[raztd]

@nineteendo thank you for taking the time to look into it. couple of notes: 1) unlike jq and python's json tool, i see your solution is not recursive (objects and arrays inside a json object are not nicely displayed, but everything is in one line) 2) i'm not a fan of that shade of bright blue

[nineteendo]

your solution is not recursive

That's because -L1 sets --maximum-indent-level to 1.

i'm not a fan of that shade of bright blue

I'm using the same colours as jq, this is just how Powershell renders them.