Lesson: User Defined Types p. 2

Learning Objectives

Students will be able to...

• Define and identify: self, __init__
• Create a class with an init method
• Understand and use the self
• Instantiate a class with an argument

Materials/Preparation

• Do Now
• Lab
• Associated Reading - section 6.2 of Book
• Read through the handout, lesson, and lab so that you are familiar with the requirements and can assist students

Pacing Guide

Instructor's Note

1. Do Now
   • Display the Do Now on the board.
2. Lesson
   • Discuss Do Now
     • Ask the students what the name of the class is. (Pet)
     • Ask the students where the code is instantiated.
     • __init__:
       • Ask students what they think the __init__ does
       • __init__ is a special function that is called when the class is first initialized.
       • if there is a print statement added to the __init__ method, when would it get printed?
     • self:
       • Ask students what they think self is. What does self.name do and how does that related to what my_pet.name does?
       • self is a way of referring to the instance within a function. So previously we had added attributes after the class was instantiated, but self allows for us to assign those at once in a single method
3. Lab
   • Students will make a pet class. Each pet will have a type, breed, color, food, noise, and name.
   • Write a function that will take a list of pets and print out their name and the food they like to eat
4. Debrief
   • Talk about the init