code: def get_executed_notebook(self):
          
          r = requests.get('http://{0}/api/notebook/{1}'.format(
                           self.zeppelin_url, self.notebook_id))
          if r.status_code == 200:
              return r.json()['body']
          else:
              print('ERROR: Could not get executed notebook.', file=sys.stderr)
              sys.exit(1)
docs: Return the executed notebook.