Question

我正在使用ubuntu 12.04。有没有办法在Python中捕获暂停事件，即如果笔记本电脑暂停，请执行此操作......？捕获关闭事件的问题相同。

Answer 1

我认为最简单的方法是使用DBUS python接口并在'org.freedesktop.UPower'界面上收听'AboutToSleep'和/或'Sleeping'事件

Answer 2

如果有人遇到同样的问题，请输入以下代码：

#!/usr/bin/env python

import dbus      # for dbus communication (obviously)
import gobject   # main loop
from dbus.mainloop.glib import DBusGMainLoop # integration into the main loop

def handle_resume_callback():
    print "System just resumed from hibernate or suspend"

def handle_suspend_callback():
    print "System about to hibernate or suspend"

DBusGMainLoop(set_as_default=True) # integrate into main loob
bus = dbus.SystemBus()             # connect to dbus system wide
bus.add_signal_receiver(           # defince the signal to listen to
    handle_resume_callback,            # name of callback function
    'Resuming',                        # singal name
    'org.freedesktop.UPower',          # interface
    'org.freedesktop.UPower'           # bus name
)

bus.add_signal_receiver(           # defince the signal to listen to
    handle_suspend_callback,            # name of callback function
    'Sleeping',                        # singal name
    'org.freedesktop.UPower',          # interface
    'org.freedesktop.UPower'           # bus name
)

loop = gobject.MainLoop()          # define mainloop
loop.run()                         # run main loop

Answer 3

你可以扩展这段代码，它会从acpid中侦听事件，尝试只打印它收到的字符串并生成你想要的事件，看看字符串是什么样的。

s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
s.connect("/var/run/acpid.socket")
print "Connected to acpid"
while 1:
    for event in s.recv(4096).split('\n'):
        event=event.split(' ')
        if len(event)<2: continue
        print event
        if event[0]=='ac_adapter':
            if event[3]=='00000001': #plugged
                plugged() #Power plugged event
            else: #unplugged
                unplugged() #Power unplugged event
        elif event[0]=='button/power':
            power_button() #Power button pressed
        elif event[0]=='button/lid':
            if event[2]=='open':
                lid_open() #Laptop lid opened
            elif event[2]=='close':
                lid_close() #Laptop lid closed

如何在Python中捕获系统挂起事件？

3 个答案: