CODEWITHSUNDEEP
pythonjsonpython-3.xflask
Python-Data-Science-Learner
Python-Data-Science-Learner

Reputation: 43

Python Flask/JSON: string indices must be integers

I am trying to write a webserver with Flask and e.g. have following function for post:

@app.route('/v1/tasks', methods=['POST'])
def post():
    data=request.get_json()
    title=data["title"]
    tasks.append(json.dumps({"id": len(tasks), "title": title, "is_completed": "false"}))
    index=len(tasks)-1
    return json.dumps({"id":index}), 200

title=data["title"] throws following error:

TypeError: string indices must be integers

The input format for POST should be: 

{title: "Test Task 2"}

I am confused because I saw a different post function, where access the contents of the JSON worked like this:

@app.route('/post', methods=['POST'])
def post():
    data=request.get_json()
    dictionary[data["key"]]=data["value"]
    data["message"]="success"
    return json.dumps(data)

What do I need to change so that I can access the title from the input JSON?

Thank you for your help!

Upvotes: 0

Views: 569

Answers (1)

Vítor Cézar
Vítor Cézar

Reputation: 269

There is nothing wrong. Verify if you are using the correct MIME media type for posting JSON, which is application/json. Test your Flask server with this code and see if it works correctly.

import requests

response = requests.post('http://localhost:5000/v1/tasks', json={'title': "Test Task 2"})
print(response.status_code)

Upvotes: 1

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