Question

I realize I’m probably just dumb and missing something big and important, but I can’t figure out how to specify a timeout in twisted using reactor.listenUDP. My goal is to be able to specify a timeout, and after said amount of time, if DatagramProtocol.datagramReceived has not been executed, have it execute a callback or something that I can use to call reactor.stop(). Any help or advice is appreciated. Thanks

Answer 1

Since Twisted is event driven, you don’t need a timeout per se. You simply need to set a state variable (like datagramRecieved) when you receive a datagram and register a looping call that checks the state variable, stops the reactor if appropriate then clears state variable:

from twisted.internet import task from twisted.internet import reactor  datagramRecieved = False timeout = 1.0 # One second  # UDP code here  def testTimeout():     global datagramRecieved     if not datagramRecieved:         reactor.stop()     datagramRecieved = False   l = task.LoopingCall(testTimeout) l.start(timeout) # call every second  # l.stop() will stop the looping calls reactor.run()