支持多处理的ATEXIT替换
multiexit的Python项目详细描述
更好、更理智、更有用的atexit替代python 3，它支持 multiprocessing。
灵感来自下面的stackoverflow问题和建筑经验 多处理守护进程：
https://stackoverflow.com/q/2546276
multiexit将安装sigterm信号的处理程序并执行 已注册的退出函数，在$ $ }。
可以注册退出函数，以便只有调用进程将调用 它们（默认值），或作为^ {EM1}$ $共享的EME>退出函数，将由 调用进程和继承它的所有子进程。API
在主进程上，在分叉或创建任何子进程之前， 呼叫multiexit.install：
install(signals=(signal.SIGTERM,),except_hook=True)
| signals: | Signals to install handler. Usually only ^{tt4}$ is required. |
|---|---|
| except_hook: | Also install a sys.excepthook that will call the exit functions in case of an unexpected exception. |
然后，对于每个退出函数，在任何子进程上，调用^ {tT5} $：
register(func,shared=False)
| func: | Exit function to register. Any callable without arguments. |
|---|---|
| shared: | If ^{tt6}$, the exit function will be called by the calling process but also by all the children subprocesses that inherit it (thus the ones created after registering it). If ^{tt6}$ is ^{tt8}$, the default, only the calling process will execute the exit function. |
示例
fromtimeimportsleepfromsignalimportSIGTERMfromosimportkill,getpidfrommultiprocessingimportProcessfrommultiexitimportinstall,register,unregisterif__name__=='__main__':# Always call install() on the main process before creating any# subprocess## This will install a required handler for SIGTERM. Subprocesses must# inherit this handler. Plus it assigns a pid as the master process# for exit or os._exit call.install()def_subproc1():@registerdefsubproc1_clean():print('Subprocess clean!')sleep(1000)# Register shared exit function so all subprocess call thisdefshared_exit():print('Shared exit being called by {} ...'.format(getpid()))register(shared_exit,shared=True)subproc1=Process(name='SubProcess1',target=_subproc1,)# proc.daemon = True# daemon means that signals (like SIGTERM) will be propagated automatically# to children. Set to false (the default), to handle the SIGTERM# (process.terminate()) to the children yourself.subproc1.start()# Register a cleaner using a decorator@registerdefclean_main():print('Terminating child {}'.format(subproc1.pid,))subproc1.terminate()subproc1.join()print('Child {} ended with {}'.format(subproc1.pid,subproc1.exitcode,))# Wait, and then kill main processsleep(3)# Suicidekill(getpid(),SIGTERM)
有关更广泛的示例，请查看example.py。
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