[pygame] ?scroll a section of the background?

[Justin Shaw <wyojustin@xxxxxxxxx>]

Pygame newbe here and I must be missing something.  I need to
scroll a section of the screen at each update.  I had hoped I
could achieve this with Rect.move(), but you already know that didn't
work.  If you think you might be able to help, please read on.

I am undating a row of pixels each frame.  I'd like to move the
history of such rows up a pixel in order to make room for the new
data.  Something like this ...

while running:
    new_row = getColoredLine()
    move_history_up_one_line()
    drawColeredLine(new_row)
    pygame.display.flip()

Any ideas will be greatly appreciated.

PyGame Rocks!

Thanks,
-- 
Justin