Python script to watch for Avahi/Bonjour workstation broadcasts and present alerts using libnotify

netwatcher.py

#!/usr/bin/env python
import dbus, gobject, avahi, pynotify, time
from dbus import DBusException
from dbus.mainloop.glib import DBusGMainLoop

TYPE = '_workstation._tcp'

def service_resolved(*args):
    name = args[5].split('.')[0]
    ip = args[7]

    n = pynotify.Notification("'%s' has joined the network" % name, ip, 'computer')
    n.set_urgency(pynotify.URGENCY_LOW)
    n.set_timeout(3)
    n.show()

def print_error(*args):
    print 'error_handler'
    print args[0]
    
def myhandler(interface, protocol, name, stype, domain, flags):
    if flags & avahi.LOOKUP_RESULT_LOCAL:
            # local service, skip
            pass

    server.ResolveService(interface, protocol, name, stype, 
        domain, avahi.PROTO_INET, dbus.UInt32(0), 
        reply_handler=service_resolved, error_handler=print_error)

loop = DBusGMainLoop()

bus = dbus.SystemBus(mainloop=loop)

server = dbus.Interface( bus.get_object(avahi.DBUS_NAME, '/'),
        'org.freedesktop.Avahi.Server')

sbrowser = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
        server.ServiceBrowserNew(avahi.IF_UNSPEC,
            avahi.PROTO_INET, TYPE, 'local', dbus.UInt32(0))),
        avahi.DBUS_INTERFACE_SERVICE_BROWSER)

sbrowser.connect_to_signal("ItemNew", myhandler)

gobject.MainLoop().run()