問題描述

用python寫了一個socket服務端的程序，但是啟動之后由于監聽連接的是一個死循環，所以不知道怎樣在cmd運行程序的時候將其終止。

#!/usr/bin/python# -*- coding: utf-8 -*-import socketimport threading, timedef tcplink(sock,addr): print(’Accept new connection from %s:%s...’ %addr) sock.send(b’Welcome!’) while True:data=sock.recv(1024)time.sleep(1)if not data or data.decode(’utf-8’)==’exit’: breaksock.send((’Hello,%s!’% data.decode(’utf-8’)).encode(’utf-8’)) sock.close() print(’Connection from %s:%s closed.’ % addr) s=socket.socket()s.bind((’127.0.0.1’,1234))s.listen(5)print(’Waiting for conection...’)while True: #accept a new connection sock,addr=s.accept() #create a new thread t=threading.Thread(target=tcplink,args=(sock,addr)) t.start()

在win10上的cmd運行后的情況是按ctrl+c,ctrl+z,ctrl+d都不能終止，請問要怎么終止程序？

問題解答

Ctrl + C

在啟動線程之前，添加 setDaemon(True)

while True: #accept a new connection sock,addr=s.accept() #create a new thread t=threading.Thread(target=tcplink,args=(sock,addr)) t.setDaemon(True) # <-- add this t.start()

daemon

A boolean value indicating whether this thread is a daemonthread (True) or not (False). This must be set before start() iscalled, otherwise RuntimeError is raised. Its initial value isinherited from the creating thread; the main thread is not a daemonthread and therefore all threads created in the main thread default todaemon = False.

The entire Python program exits when no alive non-daemon threads areleft.

這樣 <C-c> 的中斷信號就會被 rasie。

kill -9回答4：

關閉cmd命令窗口，重新開啟一個cmd，我是這么做的。

可以使用signal模塊,當按住Ctrl+C時,捕捉信息,然后退出．

#!/usr/bin/env python# -*- coding: utf-8 -*-import signaldef do_exit(signum, frame): print('exit ...') exit()signal.signal(signal.SIGINT, do_exit)while True: print('processing ...')回答6：

我記得可以

try: ......except KeyboardInterrupt: exit()