code: def stop(self, timeout=5):
          
          # Must shut down threads here so the code that calls
          # this method can know when all threads are stopped.
          for worker in self._threads:
              self._queue.put(_SHUTDOWNREQUEST)
  
          # Don't join currentThread (when stop is called inside a request).
          current = threading.currentThread()
          if timeout is not None and timeout >= 0:
              endtime = time.time() + timeout
          while self._threads:
              worker = self._threads.pop()
              if worker is not current and worker.isAlive():
                  try:
                      if timeout is None or timeout < 0:
                          worker.join()
                      else:
                          remaining_time = endtime - time.time()
                          if remaining_time > 0:
                              worker.join(remaining_time)
                          if worker.isAlive():
                              # We exhausted the timeout.
                              # Forcibly shut down the socket.
                              c = worker.conn
                              if c and not c.rfile.closed:
                                  try:
                                      c.socket.shutdown(socket.SHUT_RD)
                                  except TypeError:
                                      # pyOpenSSL sockets don't take an arg
                                      c.socket.shutdown()
                              worker.join()
                  except (
                      AssertionError,
                      # Ignore repeated Ctrl-C.
                      # See
                      # https://github.com/cherrypy/cherrypy/issues/691.
                      KeyboardInterrupt,
                  ):
                      pass
docs: Terminate all worker threads.
  
          Args:
              timeout (int): time to wait for threads to stop gracefully