Download data from API [Python]

Question

How can i download data from API, which look like this (sorry - maybe my informations are not clear but i have a beginer with API)

access-control-allow-headers: Authorization,User-Agent,Range,X-Requested-With,Content-Type,Partner
access-control-allow-methods: GET, POST, OPTIONS
access-control-allow-origin: https://test.deribit.com
cache-control: no-store
connection: keep-alive
content-length: 149
content-type: application/json
date: Fri, 04 Sep 2020 08:36:46 GMT
server: nginx/1.17.9
vary: Origin,Authorization,Partner
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
{
  "jsonrpc": "2.0",
  "id": 11,
  "error": {
    "message": "unauthorized",
    "code": 13009
  },
  "testnet": true,
  "usIn": 1599208606258957,
  "usOut": 1599208606259032,
  "usDiff": 75
}

i tried to use sth like this:

import requests

payload = {
"jsonrpc": "2.0",
"id": 11,
"error": {
"message": "unauthorized",
"code": 13009
  },
"testnet": 'true',
"usIn": 1599208606258957,
"usOut": 1599208606259032,
"usDiff": 75
}
r=requests.get('https://test.deribit.com',data = payload)


r.json()

But i got an error. Can u help me with this problem?

can you share the error as well.

Andy_101
– Andy_101

2020-09-04 08:57:28 +00:00
Commented Sep 4, 2020 at 8:57 — Andy_101
– Andy_101, Commented Sep 4, 2020 at 8:57
Is the url of the API valid ? It seems it's a website

AlexisG
– AlexisG

2020-09-04 09:03:16 +00:00
Commented Sep 4, 2020 at 9:03 — AlexisG
– AlexisG, Commented Sep 4, 2020 at 9:03

nenadp · Accepted Answer · 2020-09-04 09:13:01Z

1

You've received an empty response since JSON is unable to serialize it, probably HTTP status 400. You can check response code using response.status_code, that might help you find the cause of the error.

From your question, I can only assume you need to call POST (or maybe PUT) instead of GET, since you are sending payload, which is not standard for GET requests:

r=requests.post('https://test.deribit.com', data=payload)

Request body (your payload) is standard for POST (create an object using data from body), PUT/PATCH (Update object using data from request body). Post is sometimes also used to retrieve data, if there are too many parameters to fit in url.

answered Sep 4, 2020 at 9:13

nenadp

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Łukasz Wiland · Accepted Answer · 2020-09-04 09:03:19Z

@Andy_101 yes, my error message is below:

JSONDecodeError                           Traceback (most recent call last)
<ipython-input-50-33c5e77ebc90> in <module>()
     16 
     17 
---> 18 r.json()

~\Anaconda3\lib\site-packages\requests\models.py in json(self, **kwargs)
    894                     # used.
    895                     pass
--> 896         return complexjson.loads(self.text, **kwargs)
    897 
    898     @property

~\Anaconda3\lib\json\__init__.py in loads(s, encoding, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw)
    346             parse_int is None and parse_float is None and
    347             parse_constant is None and object_pairs_hook is None and not kw):
--> 348         return _default_decoder.decode(s)
    349     if cls is None:
    350         cls = JSONDecoder

~\Anaconda3\lib\json\decoder.py in decode(self, s, _w)
    335 
    336         """
--> 337         obj, end = self.raw_decode(s, idx=_w(s, 0).end())
    338         end = _w(s, end).end()
    339         if end != len(s):

~\Anaconda3\lib\json\decoder.py in raw_decode(self, s, idx)
    353             obj, end = self.scan_once(s, idx)
    354         except StopIteration as err:
--> 355             raise JSONDecodeError("Expecting value", s, err.value) from None
    356         return obj, end

JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Ralle12 · Accepted Answer · 2020-09-04 09:04:06Z

0

I think what you need is this. Happy coding :) If you have any questions, leave me a comment, then I will help you of the best of my ability :)

Python API Tutorial

answered Sep 4, 2020 at 9:04

Ralle12

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