将处理程序注册到 signal.signal 这样地:

#!/usr/bin/env python
import signal
import sys
def signal_handler(sig, frame):
        print('You pressed Ctrl+C!')
        sys.exit(0)
signal.signal(signal.SIGINT, signal_handler)
print('Press Ctrl+C')
signal.pause()

代码改编自 here .

有关的更多文档 signal 可以找到 here .

您可以像对待任何其他异常(键盘中断)一样对待它。创建一个新文件,并从shell运行它,其中包含以下内容,以了解我的意思:

import time, sys

x = 1
while True:
    try:
        print x
        time.sleep(.3)
        x += 1
    except KeyboardInterrupt:
        print "Bye"
        sys.exit()

作为上下文管理器:

import signal

class GracefulInterruptHandler(object):

    def __init__(self, sig=signal.SIGINT):
        self.sig = sig

    def __enter__(self):

        self.interrupted = False
        self.released = False

        self.original_handler = signal.getsignal(self.sig)

        def handler(signum, frame):
            self.release()
            self.interrupted = True

        signal.signal(self.sig, handler)

        return self

    def __exit__(self, type, value, tb):
        self.release()

    def release(self):

        if self.released:
            return False

        signal.signal(self.sig, self.original_handler)

        self.released = True

        return True

使用:

with GracefulInterruptHandler() as h:
    for i in xrange(1000):
        print "..."
        time.sleep(1)
        if h.interrupted:
            print "interrupted!"
            time.sleep(2)
            break

嵌套处理程序:

with GracefulInterruptHandler() as h1:
    while True:
        print "(1)..."
        time.sleep(1)
        with GracefulInterruptHandler() as h2:
            while True:
                print "\t(2)..."
                time.sleep(1)
                if h2.interrupted:
                    print "\t(2) interrupted!"
                    time.sleep(2)
                    break
        if h1.interrupted:
            print "(1) interrupted!"
            time.sleep(2)
            break

从这里: https://gist.github.com/2907502

你可以处理 CTRL + C 通过抓住 KeyboardInterrupt 例外。您可以在异常处理程序中实现任何清理代码。

从蟒蛇的 documentation :

import signal
import time

def handler(signum, frame):
    print 'Here you go'

signal.signal(signal.SIGINT, handler)

time.sleep(10) # Press Ctrl+c here

又一个片段

援引的 main 作为主要功能和 exit_gracefully 作为 CTRL + C 处理程序

if __name__ == '__main__':
    try:
        main()
    except KeyboardInterrupt:
        pass
    finally:
        exit_gracefully()

我修改了@udi的代码以支持多个信号(没什么特别之处):

class GracefulInterruptHandler(object):
    def __init__(self, signals=(signal.SIGINT, signal.SIGTERM)):
        self.signals = signals
        self.original_handlers = {}

    def __enter__(self):
        self.interrupted = False
        self.released = False

        for sig in self.signals:
            self.original_handlers[sig] = signal.getsignal(sig)
            signal.signal(sig, self.handler)

        return self

    def handler(self, signum, frame):
        self.release()
        self.interrupted = True

    def __exit__(self, type, value, tb):
        self.release()

    def release(self):
        if self.released:
            return False

        for sig in self.signals:
            signal.signal(sig, self.original_handlers[sig])

        self.released = True
        return True

此代码支持键盘中断调用( SIGINT ) SIGTERM ( kill <process> )

您可以使用Python内置的函数 signal module 在python中设置信号处理程序。特别是 signal.signal(signalnum, handler) 函数用于注册 handler 信号功能 signalnum .

与…对比 Matt J 他的回答是,我用一个简单的物体。这使我能够将这个处理程序解析为所有需要安全停止的线程。

class SIGINT_handler():
    def __init__(self):
        self.SIGINT = False

    def signal_handler(self, signal, frame):
        print('You pressed Ctrl+C!')
        self.SIGINT = True


handler = SIGINT_handler()
signal.signal(signal.SIGINT, handler.signal_handler)

别处

while True:
    # task
    if handler.SIGINT:
        break

就我个人而言,我不能使用Try/Except键盘中断,因为我使用的是阻塞的标准套接字(IPC)模式。所以这个信号是被提示的,但只有在接收到套接字上的数据之后才会出现。

设置信号处理程序的行为相同。

另一方面,这只适用于实际的终端。其他启动环境可能不接受ctrl+c或预处理信号。

另外,在python中还有“exceptions”和“baseexceptions”,这两个术语在解释程序需要自己干净地退出的意义上有所不同,因此某些异常的优先级高于其他异常(异常是从baseexception派生的)。

感谢现有答案,但添加了 signal.getsignal()

import signal

# store default handler of signal.SIGINT
default_handler = signal.getsignal(signal.SIGINT)
catch_count = 0

def handler(signum, frame):
    global default_handler, catch_count
    catch_count += 1
    print ('wait:', catch_count)
    if catch_count > 3:
        # recover handler for signal.SIGINT
        signal.signal(signal.SIGINT, default_handler)
        print('expecting KeyboardInterrupt')

signal.signal(signal.SIGINT, handler)
print('Press Ctrl+c here')

while True:
    pass