Python method decorator for appengine to ouput json to response.

handler_utils.py

def jsonresult(func):
  '''
  Decorator that sets response headers to output json data.
  '''
  def _func(self, *args, **kwargs):
    self.response.headers['Content-Type'] = "text/plain"
    logging.debug('--- Outputting JSON Result ---')
    result = func(self, args, kwargs)
    self.response.out.write(json.dumps(result))
  return _func