Handling notices, warnings, etc.

I am executing some PL/PGSQL scripts through a psycopg interface.

During processing, my script outputs a number of notices. How can I have  
these notices printed when the procedure is executed through psycopg.  
(There seems to be some concept of notice processing in the source, but I  
haven't worked out how to access it through Python, and it doesn't seem to  
be documented.)

Even better, how can I enable the handling of notices when accessing the  
connection through Django?

- Joel