<Response [200]> is not JSON serializable

Question

following the document conversion API example trying to use Flask to convert msword document to text, but it does not work.

Here is the code

import os, json, requests

from flask import Flask, jsonify

from watson_developer_cloud import DocumentConversionV1

app = Flask(__name__) #create flask instance

@app.route('/')

def Welcome():

    v = json.loads(os.getenv('VCAP_SERVICES'))
    svcName = 'document_conversion'
    svc = v[svcName][0]['credentials']
    url = svc['url']
    user = svc['username']
    password = svc['password']
    document_conversion = DocumentConversionV1(username=user, password=password,version='2015-12-15')
    # Example of retrieving html or plain text
    with open('./doc.docx', 'rb') as document:
        config = {'conversion_target': DocumentConversionV1.NORMALIZED_TEXT}    
        print(json.dumps(document_conversion.convert_document(document=document, config=config),indent=2))  

if __name__ == "__main__":

    port = os.getenv('VCAP_APP_PORT', '5000')
    app.run(host='0.0.0.0', port=int(port),debug=True)

Here is the runtime log

File "/home/vcap/app/.heroku/python/lib/python3.5/site-packages/flask/app.py", line 1836, in __call__

return self.wsgi_app(environ, start_response)

File "/home/vcap/app/.heroku/python/lib/python3.5/site-packages/flask/app.py", line 1820, in wsgi_app

response = self.make_response(self.handle_exception(e))

File "/home/vcap/app/.heroku/python/lib/python3.5/site-packages/flask/app.py", line 1403, in handle_exception

reraise(exc_type, exc_value, tb)

File "/home/vcap/app/.heroku/python/lib/python3.5/site-packages/flask/_compat.py", line 33, in reraise

raise value

File "/home/vcap/app/.heroku/python/lib/python3.5/site-packages/flask/app.py", line 1817, in wsgi_app

response = self.full_dispatch_request()

File "/home/vcap/app/.heroku/python/lib/python3.5/site-packages/flask/app.py", line 1477, in full_dispatch_request

rv = self.handle_user_exception(e)

File "/home/vcap/app/.heroku/python/lib/python3.5/site-packages/flask/app.py", line 1381, in handle_user_exception

reraise(exc_type, exc_value, tb)

File "/home/vcap/app/.heroku/python/lib/python3.5/site-packages/flask/_compat.py", line 33, in reraise

raise value

File "/home/vcap/app/.heroku/python/lib/python3.5/site-packages/flask/app.py", line 1475, in full_dispatch_request

rv = self.dispatch_request()

File "/home/vcap/app/.heroku/python/lib/python3.5/site-packages/flask/app.py", line 1461, in dispatch_request

return self.view_functions[rule.endpoint](**req.view_args)

File "/home/vcap/app/welcome.py", line 39, in Welcome

        password = svc['password']

        document_conversion = DocumentConversionV1(username=user, password=password,version='2015-12-15')

        # Example of retrieving html or plain text

        with open('./doc.docx', 'rb') as document:

                config = {'conversion_target': DocumentConversionV1.NORMALIZED_TEXT}

                print(json.dumps(document_conversion.convert_document(document=document, config=config),indent=2))







if __name__ == "__main__":

        port = os.getenv('VCAP_APP_PORT', '5000')

File "/home/vcap/app/.heroku/python/lib/python3.5/json/__init__.py", line 237, in dumps

**kw).encode(obj)

File "/home/vcap/app/.heroku/python/lib/python3.5/json/encoder.py", line 201, in encode

chunks = list(chunks)

File "/home/vcap/app/.heroku/python/lib/python3.5/json/encoder.py", line 436, in _iterencode

o = _default(o)

File "/home/vcap/app/.heroku/python/lib/python3.5/json/encoder.py", line 180, in default

raise TypeError(repr(o) + " is not JSON serializable")

Answer 1

The documentation appears to be out of date. The object returned is a Response object, as seen in the Requests library. In my experience, you can just use .text to get a string representing the JSON. I should say, you might have to use the .json representation to get something you can call .dumps() on.