how to solve this "Expecting value: line 1 column 1 (char 0)"?

Question

Request Method: PATCH

There is a Query String Parameter section

Answer 1

Your code cannot be run to reproduce your error. Check what you get as a response here:

r = requests.patch(url, headers=self._construct_header(),data=body)
response = getattr(r,'_content').decode("utf-8")
response_json = json.loads(response)

If you pass invalid json to json.loads(), then an error occurs with a similar message.

import json

response = b'test data'.decode("utf-8")
print(response)
response_json = json.loads(response)
print(response_json)

Output:

test data
Traceback (most recent call last):
...
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

EDIT:

In your case, to avoid an error, you need to add an if-else block. After receiving the response, you need to check what exactly you received.

r = requests.patch(url, headers=self._construct_header(),data=body)

# if necessary, check content type
print(r.headers['Content-Type'])

response = getattr(r,'_content').decode("utf-8")

if r.status_code == requests.codes.ok:
    # make sure you get the string "success"
    # if necessary, do something with the string

    return response

else:
    # if necessary, check what error you have: client or server errors, etc.
    # or throw an exception to indicate that something went wrong
    # if necessary, make sure you get the error in json format
    # you may also get an error if the json is not valid

    # since your api returns json formatted error message:
    response_dict = json.loads(response)
    
    return response_dict

In these cases, your function returns the string "success" or dict with a description of the error.

Usage:

data = { 
    'correct_prediction': 'funny',
    'is_accurate': 'False',
    'newLabel': 'funny',
} 
response = aiservice.update_prediction(data)

if isinstance(response, str):
    print('New Prediction Status: ', response)
else:
    # provide error information
    # you can extract error description from dict