16.16. Group Work - Classes, constructors, attributes, and methods

It is best to use a POGIL approach with the following. In POGIL students work in groups on activities and each member has an assigned role. For more information see https://cspogil.org/Home.

The Submit Group button will submit the answer for each each question on this page for each member of your group. It also logs you as the official group submitter.

Learning Objectives

Students will know and be able to do the following.

Content Objectives:

Look the code below. It defines a class. it also declares methods which are functions that are defined inside of a class. One of the methods is automatically called when a new object is created by the class. One of the methods is automatically called when you print an object of the class.

16.16.1. A Book Class

Run the following code

Look at the class definition. It starts with the keyword class. Then answer the following questions.

p9-4: Describe in your own words what the __init__ method does.

p9-6: Describe in your own words what the __str__ method does.

p9-9: Describe in your own words what is/are the difference(s) between a function and a method.

Put the code blocks in order below to create a class Person with a constructor (__init__) method that takes a first and last name and a __str__ method to return a string with the first and last name separated with a space.

p9-12: Describe in your own words what self means.

16.16.2. Create More Book Objects

Change the following main function to create a third book object called b3 with a title of “1984” and author “George Orwell”. Print out the values using the print function in the main.

Change the following main function to add a person object with your first and last name.

16.16.3. Add a Method to a Class

Change the following Person class to add an initials method that returns a string with the first letter in the first name and the first letter in the last name in lowercase.

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