Python 如何在多处理程序中退出整个应用程序

下面是示例代码，正如所描述的代码一样，我想在一次运行过程中退出整个应用程序。但当我调用exit0函数时，其他一些处理仍在运行。那么，如何同时杀死所有正在运行的进程呢？感谢您的帮助

from multiprocessing import Process
def submit_process():
    sig = False

    #Here is some codes trying to change the value of the variable sig

    print "submit_process"

    if(sig == True):
        #Here i want to exit the entire program instead of the single thread only.
        #exit(0)
        pass

process_list = []
print "OK"
for i in range(10):
    process = Process(target = submit_process)
    process.start()
    process_list.append(process)

for i in range( len(process_list) ):
    process_list[i].join()

您可以调用。终止进程列表中的所有内容。这通常是一个坏主意，因为您的流程的子流程将成为孤立的

从

终止进程。在Unix上，这是使用 SIGTERM信号；在Windows上使用TerminateProcess。注意，退出 不会执行处理程序和finally子句等

请注意，进程的子进程将不会终止—— 他们将成为孤儿

在您的情况下，它看起来像：

from multiprocessing import Process
def submit_process():
    sig = False

    #Here is some codes trying to change the value of the variable sig

    print "submit_process"

    if(sig == True):
        # Terminate all spawned processes
        for process in process_list:
          process.terminate()
        exit(0)

process_list = []
print "OK"
for i in range(10):
    process = Process(target = submit_process)
    process.start()
    process_list.append(process)

for i in range( len(process_list) ):
    process_list[i].join()

---

如果您的流程功能（例如submit_流程）有一个循环，您可以在该循环中测试条件，则可以使用mp.事件：

import multiprocessing as mp
import time
import logging

logger = mp.log_to_stderr(logging.DEBUG)
logger.setLevel(logging.INFO)

def submit_process(i, sig):
    logger.info("submit_process")
    while True:
        #Here is some codes trying to change the value of the variable sig
        if i == 0:
            time.sleep(2)
            sig.set()
            logger.info('SETTING sig')
        time.sleep(1)
        if sig.is_set():
            #Here i want to exit the entire program instead of the single thread only.
            #exit(0)
            logger.info('sig is set!')
            break
        else:
            logger.info('sig is NOT set!')            

process_list = []
logger.info("OK")
sig = mp.Event()
for i in range(3):
    process = mp.Process(target = submit_process, args = (i, sig, ))
    process.start()
    process_list.append(process)

for i in range( len(process_list) ):
    process_list[i].join()

屈服

[INFO/MainProcess] OK
[INFO/Process-2] child process calling self.run()
[INFO/Process-2] submit_process
[INFO/Process-3] child process calling self.run()
[INFO/Process-1] child process calling self.run()
[INFO/Process-3] submit_process
[INFO/Process-1] submit_process
[INFO/Process-2] sig is NOT set!
[INFO/Process-3] sig is NOT set!
[INFO/Process-2] sig is NOT set!

此处process-1设置mp.事件：

[INFO/Process-1] SETTING sig

在这里，过程识别到sig已设置并中断while循环：

[INFO/Process-3] sig is set!
[INFO/Process-3] process shutting down
[INFO/Process-3] process exiting with exitcode 0
[INFO/Process-2] sig is set!
[INFO/Process-2] process shutting down
[INFO/Process-2] process exiting with exitcode 0
[INFO/Process-1] sig is set!
[INFO/Process-1] process shutting down
[INFO/Process-1] process exiting with exitcode 0
[INFO/MainProcess] process shutting down