validating JSON from command line using `python -m jsontool` gives 'No JSON object could be decoded'

Question

I have a data.json file that I'm validating through the command line using python's json.tool, but it keeps giving me back an error message:

$ python -m json.tool < data.json
No JSON object could be decoded

Here are the contents of data.json:

$ cat data.json
{ "fields": 
    [
        [ "first_name", null, {} ],
        [ "last_name", null, {} ],
        [ "addr1", null, {} ],
        [ "addr2", null, {} ],
        [ "city", null, {} ],
    ]
}

I don't have a problem with single quotes, nor is the file empty (obviously), so I'm not sure what's causing the problem here.

cat dr-operators-config.json | python -m json.tool

Kanagavelu Sugumar
– Kanagavelu Sugumar

2017-10-27 16:02:47 +00:00
Commented Oct 27, 2017 at 16:02 — Kanagavelu Sugumar
– Kanagavelu Sugumar, Commented Oct 27, 2017 at 16:02
python -m json.tool... good to know it exists.

Hola Soy Edu Feliz Navidad
– Hola Soy Edu Feliz Navidad

2018-07-04 14:39:21 +00:00
Commented Jul 4, 2018 at 14:39 — Hola Soy Edu Feliz Navidad
– Hola Soy Edu Feliz Navidad, Commented Jul 4, 2018 at 14:39

Community · Accepted Answer · 2017-05-23 12:02:02Z

19

It was because of the trailing comma after the last nested list [ "city", null, {} ]. I accidentally left it in and JSON doesn't allow them.

edited May 23, 2017 at 12:02

CommunityBot

11 silver badge

answered Sep 20, 2013 at 17:38

3cheesewheel

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