Simple python Dbus example

Question

I was looking for an example of a simple call to the dbus server-client method (the client that calls the simple hello world method on the server), but everything that I have found so far, it is incomplete and poorly explained. Can someone suggest me where to find a good example?

Now I read the official documentation:

http://dbus.freedesktop.org/doc/dbus-python/doc/tutorial.html

which has a few examples, but not complete.

Thankyou