我正在尝试锁定我的 GNOME 屏幕保护程序，但是 dbus.Lock方法正在等待响应。我希望它不要等待响应（只需发送信号以锁定屏幕保护程序，然后继续生活）。我该怎么做呢？（实际上，这段代码在一个线程中，所以我继续生活，但我仍然得到令人讨厌的错误）
session_bus = dbus.SessionBus()
screensaver_proxy = session_bus.get_object('org.gnome.ScreenSaver', '/org/gnome/ScreenSaver')
locked = screensaver_proxy.Lock(dbus_interface='org.gnome.ScreenSaver')
print "HELLO" # will never get called, due to:
/*
locked = screensaver_proxy.Lock(dbus_interface='org.gnome.ScreenSaver')
File "/usr/lib/pymodules/python2.6/dbus/proxies.py", line 68, in __call__
return self._proxy_method(*args, **keywords)
File "/usr/lib/pymodules/python2.6/dbus/proxies.py", line 140, in __call__
**keywords)
File "/usr/lib/pymodules/python2.6/dbus/connection.py", line 620, in call_blocking
message, timeout)
DBusException: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken
*/