字符串索引必须是整数错误

Question

I am looking to parse out json obtained from following code:

import json
from watson_developer_cloud import ToneAnalyzerV3Beta
import urllib.request
import codecs
reader = codecs.getreader("utf-8")
tone_analyzer = ToneAnalyzerV3Beta(
    url='https://gateway.watsonplatform.net/tone-analyzer/api',
    username='<username>',
    password='<password>',
    version='2016-02-11')

data=json.dumps(tone_analyzer.tone(text='I am very happy'), indent=2)
print (data)

for cat in data['document_tone']['tone_categories']:
    print('Category:', cat['category_name'])
    for tone in cat['tones']:
        print('-', tone['tone_name'])

and keep running into error:string indices must be integers Not sure where I am dropping the ball but I would really appreciate any help with this one.

Answer 1

json.dumps() converts an object into a string. So, data is a string. So, you can't index it with 'document_tone' key (it's not a dict ). Maybe you meant json.loads() ? Or maybe tone_analyzer.tone() already returns a dict and there is no need for loads() ?