Exception not thrown in python3

[Larz60+]

surround your code with:

try:
    ...
except Exception as ex:
    # todo -- Use tkinter.messagebox here
    template = "An exception of type {0} occurred. arguments: \n{1!r}"
    message = template.format(type(ex).__name__, ex.args)
    print(message)
    raise Exception

to see what's being thrown