adding python example

README.md

@@ -83,3 +83,24 @@ Send a message:
 ```sh
 $ signal-cli --dbus-system send -m "hey test" <RECIPIENT> 
 ```
+## Receive messages from signal-cli daemon
+
+The signal-cli daemon publishes new messages to dbus.
+Here's an example using python:
+```python
+def msgRcv (timestamp, source, groupID, message, attachments):
+   print ("Message", message, "received in group", signal.getGroupName (groupID))
+   return
+
+from pydbus import SystemBus
+from gi.repository import GLib
+
+bus = SystemBus()
+loop = GLib.MainLoop()
+
+signal = bus.get('org.asamk.Signal') 
+
+```
+
+signal.onMessageReceived = msgRcv
+loop.run()