5 Best Python Classes and Objects exercises for Beginners

These Python classes and objects exercises for beginners will help you practice working with Python classes and objects. They cover various aspects of object-oriented programming, including creating classes, inheritance, encapsulation, and using Dunder methods. You can progressively work through these exercises to build a strong foundation in working with classes and objects in Python.

Python classes and objects exercises for beginners

Python Classes and Objects exercises for Beginners

Here are a few Python exercises focused on classes and objects that are suitable for beginners:

Exercise 1: Creating a Class: Create a class called Person with attributes name and age. Add a method greet() that prints a greeting message with the person’s name.

Exercise 2: Class Inheritance: Create a class called Student that inherits from the Person class. Add an additional attribute student_id to the Student class. Override the greet() method to include the student’s name and student ID in the greeting message.

Exercise 3: Working with Objects: Create two Person objects and two Student objects. Set different values for their attributes. Call the greet() method on each object to see the respective greeting messages.

Exercise 4: Class Methods and Static Methods: Add a class method get_average_age(cls, people) to the Person class that takes a list of Person objects as a parameter and calculates the average age of the people. Also, create a static method is_adult(age) that takes age as a parameter and returns True if the age is 18 or above, and False otherwise.

Exercise 5: Encapsulation: Add a private attribute __salary to the Person class. Create getter and setter methods (get_salary() and set_salary()) to access and modify the salary attribute.

These exercises should help you practice basic concepts of classes and objects in Python. You can expand on them or create additional exercises as you progress in your learning journey.

Python classes and objects exercises for beginners: Stage 2:

Learning Python classes and objects is an essential concept for beginners in Python programming. Here are some exercises to help you practice and reinforce your understanding of classes and objects:

Exercise 1: Creating a Class Create a Python class called Person. This class should have the following attributes: name, age, and country. Implement a constructor to initialize these attributes and a method introduce that prints a message introducing the person, such as “Hi, I’m [name], [age] years old from [country].”

Exercise 2: Adding Methods Expand the Person class from the previous exercise. Add a method called birthday that increments the person’s age by 1 when called.

Exercise 3: Working with Multiple Objects Create two instances of the Person class with different information and use the introduce method to introduce both people.

Exercise 4: Class Variables Add a class variable called total_people to the Person class to keep track of the total number of people created. Update the constructor to increment this variable by 1 every time a new person is created.

Exercise 5: Inheritance Create a new class called Student that inherits from the Person class. The Student class should have an additional attribute called student_id. Add a method to the Student class to display the student’s ID.

Exercise 6: Method Overriding Override the introduce method in the Student class to include the student’s ID in the introduction message.

Exercise 7: Encapsulation Add private attributes (attributes that start with a double underscore, e.g., __age) to the Person class, and implement methods to get and set these private attributes.

Exercise 8: Using Properties Change the private attributes you added in the previous exercise to properties. This way, you can access and modify them as if they were regular attributes.

Exercise 9: Composition Create a new class called Course. The Course the class should have a list of students (instances of the Student class) as an attribute. Add methods to add and remove students from the course.

Exercise 10: Using Dunder Methods Implement the __str__ method in the Person class so that when you print an instance of the Person class, it displays their name, age, and country in a readable format.

These exercises should help you practice working with Python classes and objects. They cover various aspects of object-oriented programming, including creating classes, inheritance, encapsulation, and using dunder methods. You can progressively work through these exercises to build a strong foundation in working with classes and objects in Python.

Python Object Methods:

Python Object Methods

Python classes and objects exercises for beginners:  object methods are functions defined within a class that operate on instances (objects) of that class. These methods are used to perform actions or manipulate data associated with the objects. Here are some commonly used object methods in Python:

  1. __init__(self, ...) – This is the constructor method that is automatically called when an object is created. It initializes the object’s attributes. Example:
class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age

person = Person("Alice", 25)
  1. __str__(self) – This method returns a string representation of the object. It is called by the str() function or when the object is printed. Example:
class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def __str__(self):
        return f"Person(name={self.name}, age={self.age})"

person = Person("Alice", 25)
print(person)  # Output: Person(name=Alice, age=25)
  1. __repr__(self) – This method returns a string representation of the object that can be used to recreate the object. It is called by the repr() function. Example:
class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def __repr__(self):
        return f"Person(name={self.name}, age={self.age})"

person = Person("Alice", 25)
print(repr(person))  # Output: Person(name=Alice, age=25)
  1. Custom methods – These are user-defined methods within a class that perform specific actions or operations. Example:
class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def greet(self):
        print(f"Hello, my name is {self.name} and I am {self.age} years old.")

person = Person("Alice", 25)
person.greet()  # Output: Hello, my name is Alice and I am 25 years old.

These are just a few examples of Python classes and objects exercises for beginners. You can define additional methods in your classes to perform various operations on objects and encapsulate functionality within the class.

The self Parameter:

Here are some exercises focused on the self the parameters in Python classes and objects and might be suitable as Python classes and objects for beginners:

Exercise 1: Creating a Class
Create a class called Car with attributes makemodel, and year. Add a method display_info() that prints the car’s make, model, and year.

Exercise 2: Working with Objects
Create two Car objects and set different values for their attributes. Call the display_info() method on each object to display their information.

Exercise 3: Modifying Object Attributes
Add a method update_year(self, new_year) to the Car class. This method should take a new year as a parameter and update the year attribute of the object.

Exercise 4: Using Object Attributes
Create a class called BankAccount with attributes account_number and balance. Add a method deposit(self, amount) that takes an amount as a parameter and adds it to the balance attribute. Also, add a method withdraw(self, amount) that deducts the amount from the balance attribute.

Exercise 5: Initializing Object Attributes
Modify the Car class to include an __init__() method. The __init__() method should initialize the makemodel, and year attributes when a new object is created.

These exercises should help you practice using the self parameters as Python classes and objects for Beginners. Remember that self refers to the instance of the object itself, allowing you to access and modify its attributes and methods. Feel free to expand on these exercises or create additional ones to further reinforce your understanding of working with classes and objects in Python.

Modify Object Properties:

Here are some exercises focused on modifying object properties in Python classes and objects, suitable for beginners:

Exercise 1: Creating a Class
Create a class called Rectangle with attributes width and height. Add a method calculate_area() that calculates and returns the area of the rectangle.

Exercise 2: Working with Objects
Create a Rectangle object and set values for its width and height attributes. Call the calculate_area() method to compute and display the rectangle’s area.

Exercise 3: Modifying Object Properties
Add methods set_width(self, new_width) and set_height(self, new_height) to the Rectangle class. These methods should take new values for the width and height respectively and update the corresponding attributes.

Exercise 4: Using Getter and Setter Methods
Create a class called Circle with an attribute radius. Add methods get_radius(self) and set_radius(self, new_radius) as getter and setter methods for the radius attribute.

Exercise 5: Initializing Object Properties
Modify the Rectangle class to include a __init__() method. The __init__() method should initialize the width and height attributes when a new object is created.

Remember: You may delete objects by using the del keyword:

class human:
def __init__(self, name, age):
self.name = name
self.age = age

def myfunc(self):
print(“Hello my name is ” + self.name)

p1 = human(“John”, 36)

del p1

print(p1)

The pass Statement

Class definitions must have content; however, if you have a class definition that is empty for any reason, use the pass statement to prevent an error.

class Person:
pass

# having an empty class definition like this, would raise an error without the pass statement

Python classes and Object Methods

These exercises should help you practice modifying object properties in Python classes and objects. You can expand on these exercises or create additional ones to further explore different ways of modifying and accessing object properties.

Here are some exercises focused on using the pass statement in Python classes and objects, suitable for beginners:

Exercise 1: Creating a Placeholder Class
Create a class called Person with no attributes or methods. Use the pass statement inside the class body to indicate that the class is intentionally empty.

Exercise 2: Creating an Abstract Method
Create an abstract class called Shape an abstract method calculate_area(). Use the pass statement inside the method body to indicate that the method is intended to be overridden by subclasses.

Exercise 3: Creating a Derived Class
Create a class called Square that inherits from the Shape class. Implement the calculate_area() method to calculate and return the area of the square.

Exercise 4: Creating a Placeholder Method
Create a class called Vehicle with an attribute color. Add a method start_engine() that is not implemented yet. Use the pass statement inside the method body to indicate that the method will be implemented later.

Exercise 5: Creating a Conditional Method
Create a class called Calculator with an attribute result. Add a method calculate(self, x, y, operator) that performs different calculations based on the operator parameter. Use the pass statement inside the conditional branches to indicate that the calculations will be implemented later.

These exercises should help you practice using the pass statement in Python classes and objects. The pass statement is a placeholder that allows you to create empty classes, abstract methods, or incomplete methods, indicating that they will be implemented at a later stage.

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