Andre: with this patch, you could potentially add a function or submodule that would point sys.excepthook to a function that would print the exception and then interact before returning.  If this worked, one could add, for instance, 'import friendly_traceback.idle' at the top of a file or at a Shell prompt and have friendly-traceback only activate when there is an exception.  So it would work in Shell.

I hope by 3.10 to have IDLE '>>>' prompts moved into a sidebar (instead of line numbers.  F-T prompts would be distinctly different.