def postApplication(self):
        """
        Start the application and run the reactor.
        """
        service.IService(self.application).privilegedStartService()
        app.startApplication(self.application, not self.config['no_save'])
        app.startApplication(internet.TimerService(0.1, lambda:None), 0)
        self.startReactor(None, self.oldstdout, self.oldstderr)
        log.msg("Server Shut Down.")

        Start the application and run the reactor.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/scripts/_twistw.py