在python中客户端运行receive函数后，如何在服务器端实现套接字连接丢失

我有一个程序处理网络中的一些设备。该程序为每个设备创建一个进程，每个进程在一个循环中运行socket.recv函数，以从连接的设备接收消息。 当我关闭设备然后再打开它时，程序和设备之间的连接将丢失，但recv功能不会返回任何内容或引发任何异常，进程将保持阻塞状态。 如何处理这个问题 这是我的代码：

if __name__ == '__main__':
ip = sys.argv[1]
port = sys.argv[2]
pingInterval = float(sys.argv[3])
deviceId = sys.argv[4]

print("A card reader started for ", ip)

Thread(target=setThePingerThread, args=(pingInterval,)).start()

while True:   
    clientsock = socket (AF_INET, SOCK_STREAM)
    connectionSuccessful = False
    while not connectionSuccessful:
        try:        
            clientsock.connect((ip, int(port)))
            connectionSuccessful = True
            print('socket connected to ', ip, port)
        except Exception as e:
            print('Can''t connect to the device! device ip =>', ip)
            time.sleep(5000)
            pass

    try:   
        mybuffer = bytes()
        data = bytes()
        cardNumbers = []

        while True:   
            mybuffer = clientsock.recv(100)
            data = data + mybuffer
            cardNumbers, data = retreiveCardNumbers(data)
            #print('debug: cardNumbers=', cardNumbers, ' data=',data, ' data-decoded=',data.decode("ascii"))
            for cardNumber in cardNumbers:
                print('A card hit:', cardNumber)
                sendToQueue(cardNumber, deviceId)                

    except Exception as e:
        print('Error processing card number! device ip =>', ip, e)

指

这一进程仍然受阻

我不知道

设置PingerThread

的代码，但我想这个错误已经解决了：

thread = Thread(target=setThePingerThread, args=(pingInterval,))
thread.deamon = True
thread.start()

thread.deamon

通常为False，这使得程序等待该线程的结束