[Python] Error json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0) on...

The problem is the following:

I make a request through the requests class, like this:

payload = {"offset":0,"limit":10}
headers = {'content-type': 'application/json','Accept': 'application/json'}
response = requests.post(url, data=json.dumps(payload), headers=headers)


I get a successful response, in the form I expect:

result = response.content

b'[{"id":12467458,"key":"119b21eabde78592944ef768", ...}]
​

type(a)

<class 'bytes'>
​

I try to get the response as a list of dictionaries:

data_list = response.json()

[{'id': 12467458, 'key': '119b21eabde78592944ef768', ...}]
​

type(data_list)

<class 'list'>
​

And up to this point everything is fine. The problem is that even though I apparently get the list I need, the code gives me the following error:

json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
​

If I stop the code to display what the variable in question contains, it doesn't throw any error, even though the ‘print’ is a few lines below the line where the error starts. However, if I let the code run, it drops the error and stops the code.

I've tried other way but it also have failed:

data = response.content
string_list = data.decode('utf-8','ignore')
data_list = json.loads(string_list) # Fails here with the same error


I have also tried other things like:

• filtering the data (once I have converted it into a list) and dumping it into another variable, then deleting the ‘problematic’ variable.
• create a text file, dump the response obtained in the request and then open the file again and work with the data.

I keep getting the same error.

Apart from the error itself, there is one thing I don't understand and that is that I can work with the data (once I have obtained it as a list) but I get the error in the ‘json.loads()’ or ‘response.json()’, being these lines higher up in the code.

I would be grateful for any help.

Thank you in advance.

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