In-Depth Python OOP

In-Depth Python OOP

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1. OOP Concepts

Let's start! The Object-Oriented Programming basic concepts are waiting for you here! In this section, you will get acquainted with the most important concepts for understanding Object-Oriented Programming.

What is Object-Oriented Programming?

Challenge: User

Challenge: User Auth

2. Inheritance

Inheritance - the first of the OOP principles. The entities can be inherited from other ones. You learn how it works in code here.

What is Inheritance?

Challenge: Admin

Multiple Inheritance

Method Resolution Order

Useful Functions

3. Encapsulation

Inheritance - the second of the OOP principles. The attributes and methods can be closed inside the class and used by the class only. Here you learn how to code with different access modifiers.

What is Encapsulation?

Challenge: Protected Password

@property.setter

Challenge: Password Validation

4. Polymorphism and Abstraction

Polymorphism and abstraction are the third and fourth of the OOP principles. These principles are not easy to understand. Here you will get to know them in the simplest ways.

What is Polymorphism?

Challenge: AuthMixin

What is Abstraction?

Abstract Method

Challenge: AbstractAdmin

5. Magic Methods

The magic methods make sandbox from Python. It's a unique Python tool you can't see in other languages. Here you learn how to use these methods and about the flexibility that they bring to Python.

What are magic methods?

Math Magic Methods

Comparison Magic Methods

Challenge: Users Representation and Comparison

Зміст курсу

In-Depth Python OOP

What are magic methods?

Python is a very flexible programming language, and the magic methods provide this flexibility.

Magic Methods are methods with specific syntax that provide functionality for different operations in Python.

For example:

The a + b operator invokes the __add__() magic method of the first object (a.__add__(b)). In Python, operators like + call the corresponding magic methods of the objects involved. The __init__ magic method is called when an instance of a class is created.

Note

Magic methods have a specific syntax where the method name is enclosed in double underscores (__) at start and end of method name.

Let's take a look at an example implementation of the __add__ magic method:


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class Road:
    def __init__(self, length):
        self.length = length

    def __add__(self, other_road):
        return Road(self.length + other_road.length)

road_1 = Road(20)
road_2 = Road(30)
road_3 = road_1 + road_2  # road_3 = road_1.__add__(road_2)

print(type(road_3))
print(road_3.length)

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