相关疑难解决方法(0)

有没有办法检查pid是否对应一个有效的进程？我从不同的来源获得了一个pidos.getpid(),我需要检查是否在该机器上不存在具有该pid的进程.

我需要它在Unix和Windows中可用.我还在检查PID是否未被使用.

我试图atexit在一个Process,但不幸的是它似乎没有用.这是一些示例代码:

import time
import atexit
import logging
import multiprocessing

logging.basicConfig(level=logging.DEBUG)

class W(multiprocessing.Process):
    def run(self):
        logging.debug("%s Started" % self.name)

        @atexit.register
        def log_terminate():
             # ever called?
             logging.debug("%s Terminated!" % self.name)

        while True:
            time.sleep(10)

@atexit.register
def log_exit():
    logging.debug("Main process terminated")

logging.debug("Main process started")

a = W()
b = W()
a.start()
b.start()
time.sleep(1)
a.terminate()
b.terminate()

此代码的输出是:

DEBUG:root:Main process started
DEBUG:root:W-1 Started
DEBUG:root:W-2 Started
DEBUG:root:Main process terminated

我希望的是,W.run.log_terminate()将被调用时a.terminate()和b.terminate()被调用,并且输出被什么东西likeso(强调)!:

DEBUG:root:Main process started
DEBUG:root:W-1 Started
DEBUG:root:W-2 Started …