[Zope] Shut down zope from python script

I'm a newbie, running zope and apache on my win98 box, trying to learn enough to start using zope in a production environment. Windows slows down dramatically if I leave it running more than a couple of days, so I'm working on a python script that will shut everything down and reboot at a convenient hour every two days. My question is, how do I manage an orderly shutdown of the zope server from a python script running on the same machine? All help will be appreciated. Richard