python#如何在使用multiprocessing.Pool时停止在KeyboardInterrupt上执行 [英] how to stop execution on KeyboardInterrupt while using multiprocessing.Pool #python

问题描述

可能重复:
使用python多处理池的键盘中断

Possible Duplicate:
Keyboard Interrupts with python's multiprocessing Pool

Python的多处理模块有一个称为Pool http://docs的东西. python.org/library/multiprocessing.html#module-multiprocessing.pool

Python's multiprocessing module has something called Pool http://docs.python.org/library/multiprocessing.html#module-multiprocessing.pool

虽然进程池正在运行，但是我无法使用KeyboardInterrupt(即Ctrl + c)来使脚本终止.该池产生新进程，唯一退出该进程的方法是ctrl + z，然后手动将其杀死.

While a pool of processes is operating, I can't get the script to terminate using KeyboardInterrupt i.e Ctrl + c. The pool spawns new processes and the only way to get out is ctrl + z followed by killing them manually.

这是我尝试对其进行测试的脚本:

Here is the script that I tried to test it on:

import multiprocessing
import random
import time

def sometask(arg):
    #do something nasty to arg
    time.sleep(arg)
    return random.randint(0,arg)

if __name__=="__main__":
    pool = multiprocessing.Pool(processes=4)
    print pool.map(sometask, range(10))

我的主脚本尝试执行比time.sleep()更耗时的事情，并且每次尝试运行它时，我都必须等待它完成或手动杀死它，方法是先找到它产生的过程.请提出解决方法.

My main script tries to do something that is much more time consuming than time.sleep() and every time I try to test run it, I have to wait for it to finish or kill it manually by first finding the id of the processes it spawned. Please suggest a work around.

推荐答案

我也遇到了这个问题.可能的解决方法(肮脏的方法)可以生成另一个进程，并通过该进程来处理主脚本的PID.让该进程终止主脚本.我已经尝试过了，对我来说很好.

I faced this problem too. A possible work around (a dirty one) can be spawn another process and pass that process the PID of the main script. Let that process kill the main script. I have tried this and it works fine for me.

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