USB devices UDev and D-BUS

The udisks D-Bus service, obviously, only reports disks.

Just monitor udev directly (through libudev, through 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()

This is what I use to list already plugged flash sticks. You can modify script to your needs

import dbus  bus = dbus.SystemBus()proxy = bus.get_object("org.freedesktop.Hal", "/org/freedesktop/Hal/Manager")iface = dbus.Interface(proxy, "org.freedesktop.Hal.Manager")devices = iface.GetAllDevices ()for device in devices:  try:      proxy1 = bus.get_object("org.freedesktop.Hal", device)      iface1 = dbus.Interface(proxy1, "org.freedesktop.Hal.Device")      props = iface1.GetAllProperties()      removable = iface1.GetProperty("storage.removable")      usb = iface1.GetProperty("storage.bus")      if usb== "usb":        print "\n".join(("%s: %s" % (k, props[k]) for k in props)) # shows available properties  except:    pass

And this is what I use to see if any usb plugged :

#!/usr/bin/pythonimport dbusimport gobjectclass DeviceAddedListener:                def __init__(self):                                self.bus = dbus.SystemBus()                                self.hal_manager_obj = self.bus.get_object("org.freedesktop.Hal", "/org/freedesktop/Hal/Manager")                                self.hal_manager = dbus.Interface(self.hal_manager_obj,"org.freedesktop.Hal.Manager")                                self.hal_manager.connect_to_signal("DeviceAdded", self._filter)                 def _filter(self, udi):                                device_obj = self.bus.get_object ("org.freedesktop.Hal", udi)                                device = dbus.Interface(device_obj, "org.freedesktop.Hal.Device")                                self.do_something(device)                def do_something(self, device):                                try:                                                usb = device.GetProperty("storage.bus")                                                info = device.GetProperty("info.product")                                                removable = device.GetProperty("storage.removable")                                                print info                                except:                                                pass#blah blahif __name__ == '__main__':                from dbus.mainloop.glib import DBusGMainLoop                DBusGMainLoop(set_as_default=True)                loop = gobject.MainLoop()                DeviceAddedListener()                loop.run()

Here is the example of UDisks :python udisks - enumerating device information