如果HAL守护进程正在运行(这在大多数现代linux桌面上都是如此)，那么您可以监听它的DBus信号。下面是一个如何检测USB鼠标是否已插入的示例(我手头没有USB键盘)：import gobject
import dbus
from dbus.mainloop.glib import DBusGMainLoop
DBusGMainLoop(set_as_default=True)
bus = dbus.SystemBus()
# enumerate all present mice:
manager = dbus.Interface(bus.get_object("org.freedesktop.Hal",
"/org/freedesktop/Hal/Manager"),
"org.freedesktop.Hal.Manager")
mice = set(manager.FindDeviceByCapability('input.mouse'))
def device_added(sender):
dev = dbus.Interface(bus.get_object("org.freedesktop.Hal", sender),
"org.freedesktop.Hal.Device")
try:
caps = dev.GetProperty('info.capabilities')
if 'input.mouse' in caps:
print "mouse plugged in"
mice.add(sender)
except dbus.DBusException:
pass
def device_removed(sender):
if sender in mice:
print "mouse unplugged"
mice.remove(sender)
bus.add_signal_receiver(device_added, signal_name="DeviceAdded")
bus.add_signal_receiver(device_removed, signal_name="DeviceRemoved")
loop = gobject.MainLoop()
loop.run()
