Background python thread for Pmw based GUI

[tsshivaprasad at yahoo.com]

Dear Friends,

    Hi I am new to Python programming. I would be grateful if any of 
you could manage to send me a complete sample code in which a 
Background python thread keeps checking some activity and display the 
updates in Pmw based or Tkinter based GUI..

   If some  can let me know in which website i can find such 
sample ,would be highly appreciated