如何杀死子进程(How to kill a child process)

 我发现了几种杀死子进程的方法。 我想使用os.kill（pid）。 但它不起作用，我想它应该。 
 
def onExit():
    os.kill(logProc, 0)
    QtCore.QCoreApplication.instance().quit
    return

button.clicked.connect(onExit)

logProc=os.fork()
if logProc>0:
    proc()

I've found several methods to kill a child process. I would like to use the os.kill(pid). But it doesn't work, I guess it should though.
 
def onExit():
    os.kill(logProc, 0)
    QtCore.QCoreApplication.instance().quit
    return

button.clicked.connect(onExit)

logProc=os.fork()
if logProc>0:
    proc()

原文：https://stackoverflow.com/questions/20259873