Need Dynamic Menu Code

[Tom]

How can you create dynamic menus in Python?  Imagine 2 pull-down
menus, one for Country, the other for Language.  Your selection of
Country establishes the choices/values on the Languages menu
(consisting of either native language of selected country or English).

We can do this easily in ASP.  But how can we do it in Python?  Advice
and input would be greatly appreciated...

Thanks