在python上使用gnome-screensaver command

Question

我有以下代码来检查屏幕是否被锁定(使用gnome-screensaver)

gnome-screensaver-command -q | grep "is active"

通过这个链接，https://askubuntu.com/questions/17679/how-can-i-put-the-display-to-sleep-on-screen-lock有一个在shell脚本上使用它的代码。但是如何使用python中的代码呢？并将其存储在一个变量中，而不管它是否处于活动状态。

Answer 1

您还可以通过D-Bus与gnome屏幕保护程序对话

import dbus

def screensaver_active():
    bus = dbus.SessionBus()
    screensaver = bus.get_object('org.gnome.ScreenSaver', '/')
    return bool(screensaver.GetActive())

variable = screensaver_active()

Answer 2

import dbus

def screensaver_status():
    session_bus = dbus.SessionBus()
    screensaver_list = ['org.gnome.ScreenSaver',
                        'org.cinnamon.ScreenSaver',
                        'org.kde.screensaver',
                        'org.freedesktop.ScreenSaver']
    for each in screensaver_list:
        try:
            object_path = '/{0}'.format(each.replace('.', '/'))
            get_object = session_bus.get_object(each, object_path)
            get_interface = dbus.Interface(get_object, each)
            return bool(get_interface.GetActive())
        except dbus.exceptions.DBusException:
            pass

status = screensaver_status()
print(status)

这吸引了所有的屏幕保护程序，而不仅仅是Gnome。它也不会通过使用像这样的东西来阻止

*-screensaver-command

Answer 3

您可以使用subprocess在Python语言中执行外壳命令，然后为is active行grep其标准输出：

def isScreenLocked():
    import subprocess
    com = subprocess.Popen(['gnome-screensaver-command', '-q'], stdout = subprocess.PIPE, stderr = subprocess.PIPE)
    return "is active" in com.communicate()[0]