Object lifecycle overview in Python - Mini Project: Build & Apply

Object lifecycle overview

📖 Scenario: Imagine you have a simple program that creates and uses a Car object. You want to understand how this object is created, used, and then removed from memory.

🎯 Goal: You will write a small program that creates a Car object, uses it, and then shows when the object is deleted. This will help you see the full lifecycle of an object in Python.

📋 What You'll Learn

Create a class called Car with an __init__ method

Add a method called drive that prints a message

Create an instance of Car called my_car

Call the drive method on my_car

Delete the my_car object and show a message when it is deleted

💡 Why This Matters

🌍 Real World

Understanding object lifecycle helps in managing resources like memory and files in real programs.

💼 Career

Knowing how objects are created and destroyed is important for writing efficient and bug-free code in software development.

1

Create the Car class with an __init__ method

Create a class called Car with an __init__ method that prints "Car created" when a new object is made.

Python

# Your code here

Need a hint?

The __init__ method runs when you create a new object.

2

Add a drive method to the Car class

Add a method called drive inside the Car class that prints "Car is driving" when called.

Python

class Car:
    def __init__(self):
        print("Car created")

    # Your code here

Need a hint?

Methods inside a class always have self as the first parameter.

3

Create a Car object and call the drive method

Create an object called my_car from the Car class. Then call the drive method on my_car.

Python

class Car:
    def __init__(self):
        print("Car created")

    def drive(self):
        print("Car is driving")

# Your code here

Need a hint?

Use my_car = Car() to create the object and my_car.drive() to call the method.

4

Delete the Car object and show a message

Add a __del__ method to the Car class that prints "Car deleted" when the object is removed. Then delete the my_car object using del my_car.

Python

class Car:
    def __init__(self):
        print("Car created")

    def drive(self):
        print("Car is driving")

    # Your code here

my_car = Car()
my_car.drive()

# Your code here

Need a hint?

The __del__ method runs when the object is deleted with del.