Is it possible to redirect the python output to web by using 'sys.stdout' command?

Is it possible to redirect the python output to web by using the redirecting command? I know that we can redirect the output like this

import sys
sys.stdout = open('file', 'w')
print 'test'

or

In terminal like this

$ python foo.py > file

I heard the 'Django' and 'Flask' like web framework can do the trick. I wonder whether by using a simple command like sys.stdout can redirect the output to web?