Simply put, I want to remove the functionality of the backspace key. Not everything has to be an editor.
According to the API documentation for appuifw.text, doing something like example_text.bind(key_codes.EKeyBackspace, None) should be able to clear the binding. However, this causes Python to exit with KERN EXEC 3 instead.
Yes, I'm aware of appuifw2, but it does not work in 1.9.7, if I recall correctly.