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> I don't think that it's possible that stdin, stdout and/or stderr have
> its own terminal. I suppose that the 3 streams are always attached to
> the same terminal. So I don't see why the function would take an
> argument. Tell me if I am wrong.
I think it can be useful in case the program creates its own
session/terminal using openpty?
> Instead of using sys.__stdout__.fileno(), you can directly use 1
> because Python always create sys.__stdout__ from the file descriptor
> 1.
From pythonrun.c:
 /* Set sys.stdin */
 fd = fileno(stdin);
 [...]
 /* Set sys.stdout */
 fd = fileno(stdout);
 [...]
 /* Set sys.stderr, replaces the preliminary stderr */
 fd = fileno(stderr);