从正在运行的进程中调用函数 [英] Call a function from a running process

问题描述

我的程序启动一个子进程，该子进程必须在初始化后向父级发送某种信号.如果我可以在父级中设置处理程序，这将是完美的，在发送此信号时会调用该处理程序.有什么办法吗?

my programm starts a subprocess, which has to send some kind of signal to the parent after initialization. It would be perfekt if i could set up a handler in parent, which is called when this signal is sent. Is there any way to do it?

Alendit

推荐答案

如果使用的是Python 2.6，则可以使用标准库中的multiprocessing模块，尤其是管道和队列.来自文档的简单示例:

If you are using Python 2.6, you can use the multiprocessing module from the standard library, in particular pipes and queues. Simple example from the docs:

from multiprocessing import Process, Pipe

def f(conn): #This code will be spawned as a new child process
    conn.send([42, None, 'hello']) #The child process sends a msg to the pipe
    conn.close()

if __name__ == '__main__':
    parent_conn, child_conn = Pipe()
    p = Process(target=f, args=(child_conn,)) # prepare to spawn the child
    p.start() # spawn it
    print parent_conn.recv()   # prints "[42, None, 'hello']"
    p.join() #wait for child to exit

如果您使用的是Python 2.4或2.5，请不要失望-可以使用反向端口此处.

If you are using Python 2.4 or 2.5, don't despair - a backport is available here.

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