[Pmw-general] Create auto-updating status window?

[reckoner <rec...@gm...>]

Is it possible to automatically update a gui based upon changes in a 
certain file? I know the GUI has a

    root.mainloop()

call where it polls for user input in the GUI. But, can it also poll for 
changes in a separate file, say, when that file is written to?

I'm trying to create an auto updating GUI that monitors and reacts to 
changes in certain files.

Thanks in advance