Difference between url.json() and json.loads()

Question

I have written the following code to read sample JSON data from url,

HEADER = {"content-type": "application/josn"}

session = requests.Session()
session.verify = True
session.headers = HEADER

output = session.request("GET", "https://jsonplaceholder.typicode.com/todos/1", timeout=30)

If I print output I get,

<Response [200]>

If I do,

output = session.request("GET", "https://jsonplaceholder.typicode.com/todos/1", timeout=30).json()

I get actual json content,

{u'completed': False, u'userId': 1, u'id': 1, u'title': u'delectus aut autem'}

But when I do,

output = session.request("GET", "https://jsonplaceholder.typicode.com/todos/1", timeout=30)
print(json.loads(output))

I get,

  File "/usr/lib64/python2.7/json/decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
TypeError: expected string or buffer

Can someone please give an example to me when should I use .json() and when json.loads()?

Possible dupe: TypeError: the JSON object must be str, not 'bytes' — wim
– wim, Commented Oct 16, 2018 at 3:56
A bit irrelevant to the question at hand, but your HEADER declaration has a typo: application/josn should be application/json. — esqew
– esqew, Commented Oct 16, 2018 at 3:58
can someone please tell me why am I down voted ? i can add more details if needed, but please leave a comment at least. — MaverickD
– MaverickD, Commented Oct 16, 2018 at 4:02

Mauricio Cortazar · Accepted Answer · 2018-10-16 03:53:14Z

6

The .json is just a shortcut of json.loads() when the response is a json.

print(json.loads(output))

is not working because you need to get the body of the request, i think it is

print(json.loads(output.text))

answered Oct 16, 2018 at 3:53

Mauricio Cortazar

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3 Comments

esqew Over a year ago

This is correct - output in the second example in the OP returns a Response-type object, which is not a datatype json.loads() accepts as the s argument. In fact, the only accepted datatype is str of unicode (source).

MaverickD Over a year ago

thank you, how does .json() automatically gets the output.text?

Mauricio Cortazar Over a year ago

@MaverickD because is a method of the response object

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