Altering 'print'/mod_python

Remco Gerlich scarblac at
Mon May 14 14:18:57 CEST 2001

Jeff Davis <jdavis at> wrote in comp.lang.python:
>         I have a webserver running mod_python and I would like it to execute 
> python scripts (kind of like mod_perl or php). I basically made the python 
> handler script call execfile(req.filename). I am not sure this is the best 
> method. 
>         Anyway, when inside the python script that is called by execfile you
> have to use req.write() to print stuff. Is there a way to access the print 
> statement directly so that when someone says print it calls req.write 
> rather than printing to a file object?
>         Any advice here would be appreciated, I am certainly not confident
> that I am on the right track.

Redirect stdout, like this:

   import sys
   oldstdout = sys.stdout
   sys.stdout = req
   sys.stdout = oldstdout

Print calls sys.stdout.write, which is now redirected to req.write. The try:
finally: is necessary to make sure the old stdout is reinstated, even if an
exception occurs.

That would work. I don't know how sensible using execfile is, either.

Remco Gerlich

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