[mod_python] changing publisher `content' before sent to client

Jaime Wyant wrote:
> Actually, I need to perform string manipulation on *everything* that 
> gets handled by publisher.  I don't want to manually edit each function 
> that the handler exposes.
> 
> FWIW, I'm doing this because I would like to have two versions of my 
> website ->
> 
> test.mysite.com
> real.mysite.com

def index(req)
     body = do_stuff_with_your_modules(req)
     return body.replace("test.mysite.com", "real.mysite.com")