Grequests with multiple JSON payloads

Question

I'm trying to simultaneously send multiple POST requests with JSON payloads and retrieve the JSON results. I've read a few other posts on SO but nothing is doing the trick.

def transcribe(vid_segs):
   payloads = []
   for vid in vid_segs:
      vid = base64.b64encode(open(vid).read())
      payload = {
      "config": {
            "encoding": "LINEAR16",
            "sampleRateHertz": 16000,
            "languageCode": "en-US",
            "speechContexts": {
                "phrases:": ["Barack", "Obama", "Barack Obama"]
            }
        },
        "audio": {
            "content": vid
        }
    }
    payloads.append(payload)

   url = "https://speech.googleapis.com/v1/speech:recognize?key=MYAPIKEY"
   unsent_request = []
   for payload_single in payloads:
      unsent_request.append(grequests.get(url,
                                        params=payload_single))
   responses = grequests.map(unsent_request)
   for response in responses:
      print response.json()
      response.close()

If I use response.json(), it returns the error:

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

If I try with response.json, what's returned isn't the actual JSON content, just the object details and the response code:

<bound method Response.json of <Response [404]>>

Any ideas? Thanks in advance!

Answer 1

response.json is a method, so you need to call it: response.json(). The JSONDecodeError is telling you that the response isn't valid JSON. Try printing response.text (the response as text) or response.content (binary response) to see what the response actually consists of.

As @Lohmar ASHAR points out in a comment, you're getting a 404, so it's probably not suprising you're not getting JSON back.

More on responses: http://docs.python-requests.org/en/master/user/quickstart/#response-content