Can't get tkinter database aware cascading comboboxes to update properly

[deanhystad]

When I hear "cascading" and database I think of something that has hierarchy, like a TreeView displaying data which also has hierarchy. You can click on something in the tree view and if the corresponding data object is a collection the tree expands to show the components of the thing. You can make a treeview-like view using multiple combo boxes. Is that what you are trying to do? If so, why not use a TreeView? I would think a TreeView as being a much better way to view a database.