python src/test.py
Traceback (most recent call last):
  File "src/test.py", line 27, in ?
    TestApp()
  File "src/test.py", line 10, in __init__
    bus = dbus.SessionBus()
  File "/var/lib/python-support/python2.4/dbus/_dbus.py", line 266, in __new__
    return Bus.__new__(cls, Bus.TYPE_SESSION, use_default_mainloop, private)
  File "/var/lib/python-support/python2.4/dbus/_dbus.py", line 99, in __new__
    bus._connection = dbus_bindings.bus_get(bus_type, private)
  File "dbus_bindings.pyx", line 1692, in dbus_bindings.bus_get
dbus_bindings.DBusException: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.