If you add the Mouse&Keyboard object to the layout, and run the application with Python scripting, it will crash/give Python interpreter errors.
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Can reproduce, will try fix soon. As a workaround, rename your Mouse&Keyboard object to something without the '&' character, like MouseKeyboard.
renaming it doesnt seem to fix
I already reported this in the sourceforge bugs last month.. Really sucks, I'm a python lover..