Google Speech API json解析？

Question

I have obtained the results from google speech in a variable

data = {'name': '1235433175192040985', 'metadata': {'@type': 'type.googleapis.com/google.cloud.speech.v1.LongRunningRecognizeMetadata', 'progressPercent': 100, 'startTime': '2018-04-11T12:56:58.237060Z', 'lastUpdateTime': '2018-04-11T12:57:44.944653Z'}, 'done': true, 'response': {'@type': 'type.googleapis.com/google.cloud.speech.v1.LongRunningRecognizeResponse', 'results': [{'alternatives': [{'transcript': 'hi how are you', 'confidence': 0.92438406}]}, {'alternatives': [{'transcript': 'How are you doing?', 'confidence': 0.9402676}]}]}}

json_dict = json.loads(data)

On this it throws error

JSONDecodeError: Expecting property name enclosed in double quotes: line 1 column 2 (char 1)

For the rest of parsing I wrote

for result in json_dict["response"]["results"]:
  if "alternatives" in result:
    alternatives = result["alternatives"][0]
    if "confidence" in alternatives:
      print(alternatives["confidence"])
    if "transcript" in alternatives:
      print(alternatives["transcript"])

What am I doing wrong?

Answer 1

The JSON parser in Python expects your blob to use double quotation marks, since that is the JSON standard .

{
  "name": "John Doe"
}

You could replace the single quotes with double quotes, as explained in this answer .

However, I'm pretty sure the problem can be solved elsewhere, since the Google API most likely uses valid JSON in it's responses. How do you parse the response from Google's API?

Answer 2

The problem in your snippet is that you're passing a dict to json.loads. json.loads decodes json to dict, so it redundant and wrong. read the docs

Answer 3

The dict doesn't need any further json methods, you can work with it as is.

for result in data["response"]["results"]:
  if "alternatives" in result:
    alternatives = result["alternatives"][0]
    if "confidence" in alternatives:
      print(alternatives["confidence"])
    if "transcript" in alternatives:
      print(alternatives["transcript"])

Yields this output:

0.92438406
hi how are you
0.9402676
How are you doing?