code: def start(self, daemon = False):
          
          self.daemon = daemon
          self.io_threads = []
          self.event_thread = EventDispatcherThread(self.event_dispatcher,
                                      daemon = daemon, exc_queue = self.exc_queue)
          self.event_thread.start()
          for handler in self.io_handlers:
              self._run_io_threads(handler)
          for handler in self.timeout_handlers:
              self._run_timeout_threads(handler)
docs: Start the threads.