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.
Students will know and be able to do the following.
Identify the parts of a class
Explain what a constructor is and what it does
Explain what the __str__ method does
Explain the difference(s) between a function and method.
Create new objects and name them
Create new methods
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
__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
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.