Dissecting a Class
Classes are blueprints. Click on the highlighted parts of this simple `Robot` class definition to understand its components.
CT Links: Modeling (real-world concept to code), Decomposition (breaking down class structure).
class Robot:
def __init__(self, name):
self.name = name # Store the robot's nameIdentify all parts!
Build an `__init__` Method
The `__init__` method initializes an object. Drag the pieces to construct the `__init__` method for a `Car` class that takes `make` and `model` as input and stores them.
CT Links: Decomposition (building methods step-by-step), Modeling (defining object initialization).
Instance Creation Simulator
We've defined a `Book` class below. In the editor, write code to: 1. Create an instance (object) of the `Book` class called `my_book` with title "AI Adventures". 2. Print the `title` attribute of `my_book`.
CT Links: Abstraction (using the class without seeing all details), Modeling (creating specific objects from the blueprint).
Provided Class Definition:
class Book:
def __init__(self, title):
self.title = title
self.pages = 100 # Default valueSpot the Attribute Assignment
Instance attributes store an object's data. They are usually assigned inside `__init__` using `self.attribute_name = value`. Click the line(s) below that assign instance attributes.
CT Links: Decomposition (isolating specific code function).
OOP Mini Missions!
Combine your knowledge! Complete these small OOP tasks. The simulator checks your code's structure and basic output.
CT Links: Abstraction, Decomposition, Modeling (combined).
Mission 1: Define a `Cat` Class
Define a class named `Cat`. Inside it, define an `__init__` method that takes `self` and `name` as parameters. Inside `__init__`, assign the `name` parameter to an instance attribute called `name` (i.e., `self.name = name`).
Mission 2: Create & Print
Assuming the `Cat` class from Mission 1 exists (you don't need to redefine it here), write code to: 1. Create an instance of `Cat` named `whiskers` with the name "Whiskers". 2. Print the `name` attribute of the `whiskers` object.
Mission 3: Add a Method
Modify the `Cat` class definition (you'll need to write the full class again here). Add a method called `meow` that takes only `self` as a parameter and prints the string "Meow!".
Module 29 Practice Complete!
Excellent work building classes and creating objects! You're grasping the core of OOP.
Ready for more? Try the Advanced Practice for Module 29.