1. Why is it better to customize by sub classing rather than copying the original and modifying? 2. Why is it better to call back to a super class method to run default actions, instead of copying and...

1. Why is it better to customize by sub classing rather than copying the original and modifying? 2. Why is it better to call back to a super class method to run default actions, instead of copying and modifying its code in a subclass? 3. Why is it better to use tools like __dict__ that allow objects to be processed generically than to write more custom code for each type of class?