title: <Response [200]> is not JSON serializable
body: <p>following the document conversion API example trying to use Flask to convert msword document to text, but it does not work.</p>
  
  <p>Here is the code</p>
  
  <pre><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)
  </code></pre>
  
  <p>Here is the runtime log</p>
  
  <pre><code>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")
  </code></pre>