Classes and Objects -- Digging a little deeper

Students will...

1. be able to write a function that takes an object as a parameter.
2. be able to write a function that returns an object.
3. understand the utility of writing the __str__ method for a class and be able to write the code for it.
4. be able to write code to create and return an instance of a class.
5. understand that objects are mutable.
6. be able to write methods to override built-in operations, like __add__.