Reiter
We learn about the constructor of a class, used to create an instance (think of "dog" as a class and "bello" as an instance of that class).
We also see how we can pass arguments to the instance during construction, or use defaults set in our class ("age" would be a specific value we pass for "bello", while "number_of_eyes" hopefully wouldn't be).
We also see how we can pass arguments to the instance during construction, or use defaults set in our class ("age" would be a specific value we pass for "bello", while "number_of_eyes" hopefully wouldn't be).