code: def redirect_stream(system_stream, target_stream):
          
          if target_stream is None:
              target_fd = os.open(os.devnull, os.O_RDWR)
          else:
              target_fd = target_stream.fileno()
          os.dup2(target_fd, system_stream.fileno())
docs: Redirect a system stream to a specified file.
              `system_stream` is a standard system stream such as
              ``sys.stdout``. `target_stream` is an open file object that
              should replace the corresponding system stream object.
              If `target_stream` is ``None``, defaults to opening the
              operating system's null device and using its file descriptor.