code: def quit(self):
          '''Set quit signal'''
          self._quit = True
          # stop xmlrpc server
          if hasattr(self, 'xmlrpc_server'):
              self.xmlrpc_ioloop.add_callback(self.xmlrpc_server.stop)
              self.xmlrpc_ioloop.add_callback(self.xmlrpc_ioloop.stopf quit(self):
          '''Set quit signal'''
          self._quit = True
          # stop xmlrpc server
          if hasattr(self, 'xmlrpc_server'):
              self.xmlrpc_ioloop.add_callback(self.xmlrpc_server.stop)
              self.xmlrpc_ioloop.add_callback(self.xmlrpc_ioloop.stop)
docs: Set quit signal