redirect output from embedded C module

[legba]

hi all..  I'm writing an application in python2.3 under linux debian 
which accepts new "plug-ins" in the form of c-written python extension
modules.
My problem is that I'd like to catch the stdout/stderr from one of
this modules
and redirect it into a tkinter text widget, in real time. Let's say
the module's
name is plugin and that plugin.doSomething() prints out with a C
printf()
the string "it's a mess".

Redirecting sys.stdout before calling plugin.doSomething() doesn't
work, I guess
because the plugin code has a different stdout file then python. So
the second solution is to force every plugin-writer to embed in every
plugin the C lines:

if ((fd = open("outfile", O_WRONLY | O_CREAT | O_TRUNC, 0600)) == -1)
   {
      perror("open outfile");
      exit(2);
   }
   dup2(fd, fileno(stdout));

and use as "outfile" the real stout. Then redirect python stdout to
the text widget.
But how do I access python stdout from C?
or even better how do I access the text widget directly from C?
or, since this solution looks quite crappy, how do I do it in another
way?

thanks to all
legba