Writing JSON object to file and getting null written instead

Question

I'm using Python to create a data.json file and write a json object to it.

with open('data.json', 'w', encoding='utf-8') as f:
        util.json.dump(jsonData, f, ensure_ascii=False, indent=4)

where jsonData = {'Book': {'author': 'John Black', 'description': 'When....

When I locate data.json file on my computer and open it to modify the content, instead of {'Book': {'author':... I see null printed in the file. I don't understand why it is happening, jsonData is not null, I printed it out before manipulating to double-check. Thank you for your help in advance! =)

what i s 'jsonData'? Can you paste the full code what you are doing ? — Kris
– Kris, Commented Sep 30, 2019 at 6:41
Can't figure out why use util.json.dump. Just using json.dump() works fine here — Saharsh
– Saharsh, Commented Sep 30, 2019 at 6:43
Hello and welcome to SO. You may want to read How to Ask and minimal reproducible example and edit your question accordingly. — bruno desthuilliers
– bruno desthuilliers, Commented Sep 30, 2019 at 7:12

Saharsh · Accepted Answer · 2019-09-30 06:45:49Z

1

I am not sure what purpose util is fulfilling here but using json library seems to be giving right results.

import json

jsonData = {'Book': {'author': 'John Black', 'description': 'When....'}}

with open('data.json', 'w', encoding='utf-8') as f:
    json.dump(jsonData, f, ensure_ascii=False, indent=4)

answered Sep 30, 2019 at 6:45

Saharsh

1,09811 silver badges29 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

vvvvv · Accepted Answer · 2019-09-30 07:57:22Z

0

import json
jsonData = {
    "Book": {
        "author": "ohn Black",
        "description": "afasffsaf afafasfsa"
    }
}

with open('data.json', 'w', encoding='utf-8') as f:
   f.write(json.dumps(jsonData))

edited Sep 30, 2019 at 7:57

vvvvv

32.9k19 gold badges70 silver badges103 bronze badges

answered Sep 30, 2019 at 6:46

Avinash Dalvi

9,4299 gold badges34 silver badges60 bronze badges

Collectives™ on Stack Overflow

Writing JSON object to file and getting null written instead

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related