Can you really write an easy python script which handles real-time server pushing of information to the customer when information is available?
You can preserve the bond between your client and server live but this could take considerably more server assets.
Edit: If you wish to do that, see
- Python Comet Server
- How to implement Comet server side with Python?
- The latest recommendation for Comet in Python?
You could have the customer register an Ip that the server can contact, however, you will encounter a lot of challenge with client-side fire walls.
Or simply do what most services do, and also have the client poll the server from time to time.