Can I hook a "file" to a python script?

[Scott Chapman]

Hi!

I'd like a "file" on the Linux box to actually be the input and output 
of a Python script.  Anything written to the file would be sent to a 
database and anything read from the file would come from the database.  
I know how to do the database end of this but I'm not sure if a script 
can be hooked to a "file" transparently.  The script would probably 
have to be run as a daemon.  I doubt there's enough magic in the Linux 
world to make it so that a read/write would actually launch the script. 
That'd be Ok.

Scott