CGI/Python server push

Is it possible to write a simple python script which handles real-time server pushin开发者_JS百科g of data back to the client when data is available?

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"Yes, but":

You can keep the connection between the client and server live; but this can take significantly more server resources.

Edit: If you want to do this, see

• Python Comet Server
• How to implement Comet server side with Python?
• The latest recommendation for Comet in Python?

You can have the client register an IP address which the server can contact, but you will run into a huge amount of trouble with client-side firewalls.

Or you can just do what most services do, and have the client poll the server occasionally.