python requests POST 400 error

Question

I've been looking to many questions similar to mine but I could not find a solution.

I'm using requests to perform a POST request. I've tried a lot of combinations inside the request but nothing returns a 201 ok.

Here is my code:

 import json
 import requests

 if __name__ == '__main__':

    headers = {'content-type' : 'application/json'}
    url = "http://myserver/ext/v3.1/test_device"
    message = {"atribute_a": "value", "atribute_b": "valueb"}
    params = {"priority":"normal"}

    r = requests.post(url, params=params, headers=headers, data = json.dumps(message) )
    print(r)

I've also tried withou json.dumps but it also gives me 400 bad request. I've also tried to add the params directly to the url like: ...?priority=normal but with no success.

Answer 1

The easiest technique is to use json instead of data as followed:

requests.post(url, headers=headers, params=params, json=data)

Answer 2

Based on the comments, your server is actually expecting data as a stringified JSON object. As far as the params are concerned, it'd most probably help if they're declared as a tuple of tuples (or a dict of dicts)

Try the following -

headers = {
    'content-type': 'application/json',
}

params = (
    ('priority', 'normal'),
)

data = {
    "atribute_a": "value",
    "atribute_b": false
}

requests.post(url, headers=headers, params=params, data=str(data))