What is the purpose and value of object-oriented programming (OOP)?

OOP (Object-Oriented Programming) is a programming paradigm based on the concept of "objects." The purpose and significance of OOP are as follows:

• Encapsulation: Combining data (attributes) and methods (functions) that work with this data into a single unit — an object. This hides the internal implementation and protects data from direct external influence.

• Inheritance: Allows creating new classes (descendants) based on existing ones (parents), with descendants inheriting attributes and methods from the parent. This promotes code reuse and the creation of hierarchies.

• Polymorphism: Enables using objects of different classes with a common interface. Different classes can implement the same method differently, and the system will automatically call the appropriate implementation based on the object type.

• Abstraction: Focusing on the essential details of an object, ignoring non-essential ones. This simplifies understanding and designing complex systems.

• Modularity: Dividing the program into loosely coupled, independent modules-objects that are easy to manage and test.

The significance of OOP:

• Code reuse: Thanks to inheritance and encapsulation.
• Improved readability and maintainability: Structuring by objects makes the code more understandable.
• Simplification of developing complex systems: Decomposition into objects is more manageable.
• Increased flexibility: Polymorphism provides greater flexibility in working with different data types.
• Improved teamwork: Dividing tasks by objects simplifies collaborative development.

Example of encapsulation:

class BankAccount:
    def __init__(self, balance):
        # Private attribute
        self._balance = balance

    def deposit(self, amount):
        if amount > 0:
            self._balance += amount

    def get_balance(self):
        return self._balance