How to define a global file?

[Skaperen]

in some cases i cheat to do logging.  i open() or os.open() a file and os.dup2() its file descriptor to stdout (1).  i am running Linux.  i have no idea if this works in Windows (nor do i care).  then all print() goes to that file, even in called functions and forked processes (which i do a lot of).