IT would be nice if hjson honored toJSON() in a way consistent with the standard JSON.stringify().

From Mozilla Docs

If an object being stringified has a property named toJSON whose value is a function, then the toJSON() method customizes JSON stringification behavior: ins

The consle_scripts of setup.py should be used.

The hjson file in bin of the python prefix now says

python -m hjson.tool "$@"

And it won't do, since I didn't install this to Python 2 on my Ubuntu.