USB设备UDev和D-BUS

该udisks d-巴士服务，很明显，仅报告磁盘。

只需直接监视udev（通过libudev，通过pyudev）。

import pyudevcontext = pyudev.Context()monitor = pyudev.Monitor.from_netlink(context)observer = pyudev.pygtk.GUDevMonitorObserver(monitor)observer.connect('device-added', device_added_callback)observer.connect('device-changed', device_changed_callback)monitor.enable_receiving()mainloop = gobject.MainLoop()mainloop.run()