相关疑难解决方法(0)

如何对Ctrl + C键事件进行多线程python程序响应？

编辑:代码是这样的:

import threading
current = 0

class MyThread(threading.Thread):
    def __init__(self, total):
        threading.Thread.__init__(self)
        self.total = total

    def stop(self):
        self._Thread__stop()

    def run(self):
        global current
        while current<self.total:
            lock = threading.Lock()
            lock.acquire()
            current+=1
            lock.release()
            print current

if __name__=='__main__':

    threads = []
    thread_count = 10
    total = 10000
    for i in range(0, thread_count):
        t = MyThread(total)
        t.setDaemon(True)
        threads.append(t)
    for i in range(0, thread_count):
        threads[i].start()

我试图在所有线程上删除join()但它仍然无效.是因为每个线程的run()过程中的锁段？

编辑:上面的代码应该可以工作但是当当前变量在5,000-6,000范围内并且通过如下错误时它总是被中断

Exception in thread Thread-4 (most likely raised during interpreter shutdown):
Traceback (most recent call …

我正在制作一个简单的多线程端口扫描器.它扫描主机上的所有端口并返回打开的端口.麻烦在于中断扫描.扫描完成需要花费大量时间,有时我希望在扫描过程中用Cc杀死程序.麻烦的是扫描不会停止.主线程被锁定在queue.join()上,并且忘记了KeyboardInterrupt,直到处理了队列中的所有数据,因此解除了主线程并正常退出程序.我的所有线程都被守护进来,所以当主线程死掉时,他们应该和他一起死掉.

我尝试使用信号库,没有成功.覆盖threading.Thread类和正常终止的添加方法不起作用...主线程在执行queue.join()时不会收到KeyboardInterrupt

import threading, sys, Queue, socket

queue = Queue.Queue()

def scan(host):
    while True:
        port = queue.get()

        if port > 999 and port % 1000 == 0:
            print port
        try:
            #sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
            #sock.settimeout(2) #you need timeout or else it will try to connect forever! 
            #sock.connect((host, port))
            #----OR----
            sock = socket.create_connection((host, port), timeout = 2)

            sock.send('aaa')
            data = sock.recv(100)
            print "Port {} open, message: {}".format(port, data)
            sock.shutdown()
            sock.close()
            queue.task_done()
        except:
            queue.task_done()


def main(host):
    #populate queue
    for i in range(1, …

我正在编写一个python脚本,需要运行一个侦听网络套接字的线程.

我使用以下代码使用Ctrl+ 杀死它时遇到了麻烦c:

#!/usr/bin/python

import signal, sys, threading

THREADS = []

def handler(signal, frame):
    global THREADS
    print "Ctrl-C.... Exiting"
    for t in THREADS:
        t.alive = False
    sys.exit(0)

class thread(threading.Thread):
    def __init__(self):
        self.alive = True
        threading.Thread.__init__(self)


    def run(self):
        while self.alive:
            # do something
            pass

def main():
    global THREADS
    t = thread()
    t.start()
    THREADS.append(t)

if __name__ == '__main__':
    signal.signal(signal.SIGINT, handler)
    main()

欣赏有关如何捕获Ctrl+ c并终止脚本的任何建议.