Python Object-Oriented Programming (OOP)

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Questions and Answers

What is the purpose of the init() method in Python?

To create a new object of the class

To access the attributes or methods of the class

To verify that there are enough resources for the object

To simulate the constructor of the class (correct)

Which type of constructor in Python can accept any number of arguments at the time of creating the class object?

Parameterized Constructor (correct)

Non-parameterized Constructor

Derived Constructor

Default Constructor

What does inheritance provide in the object-oriented paradigm?

Code reusability (correct)

Function overloading

Polymorphism

Data encapsulation

In Python, how is multi-level inheritance achieved?

By inheriting another derived class Signup and view all the answers

What is possible in Python, regarding inheritance in the child class?

Inheriting multiple base classes Signup and view all the answers

What does polymorphism refer to in programming?

The use of a single type entity Signup and view all the answers

What happens when a child class inherits properties from the parent class?

The child class acquires and can access all properties of the parent class Signup and view all the answers

What does every class in Python must have, even if it relies on the default constructor?

init() method Signup and view all the answers

What does the constructor verify when creating an object of a class in Python?

Whether there are enough resources for the object to perform any start-up task Signup and view all the answers

What is the role of self-keyword in Python's init() method?

It allows accessing the attributes or methods of the instance Signup and view all the answers

What is the primary focus of Object-Oriented Programming (OOP) in Python?

Creating reusable code Signup and view all the answers

What are the two characteristics of an object in Python's Object-Oriented Programming (OOP)?

Attributes and behavior Signup and view all the answers

Which element serves as a blueprint for an object in Object-Oriented Programming (OOP)?

Class Signup and view all the answers

What is an object (instance) in the context of Object-Oriented Programming (OOP)?

An instantiation of a class Signup and view all the answers

Which function is always executed when a class is being initiated in Python?

init() Signup and view all the answers

What does the acronym DRY stand for in the context of Object-Oriented Programming (OOP)?

Don't Repeat Yourself Signup and view all the answers

Study Notes

Purpose of `init()` Method

Initialize object attributes upon creation of a class instance.
Act as a constructor that is automatically called when a new object is instantiated.

Accepting Arguments in Constructors

Python supports constructors that can take any number of arguments using the *args and **kwargs syntax.

Inheritance in Object-Oriented Paradigm

Facilitates code reusability and method overriding.
Enables the creation of a new class (child) based on an existing class (parent), inheriting its properties and methods.

Multi-level Inheritance in Python

Achieved by inheriting from a derived class, allowing for a hierarchy of classes.
A class can be derived from another derived class, forming multiple levels of inheritance.

Inheritance Properties in Child Class

A child class can access and modify properties and methods from its parent class.
Supports overriding inherited methods to provide specific behavior in the child class.

Polymorphism in Programming

Refers to the ability of different classes to be treated as instances of the same class through a common interface.
Allows methods to perform differently based on the object calling them.

Effects of Child Class Inheriting from Parent Class

Gains access to attributes and methods of the parent class.
Promotes data and behavior sharing among classes.

Necessity of Constructor in Every Class

Every class in Python should have at least one constructor method, either explicitly defined or default, for object initialization.

Constructor Verification Process

Validates the parameters provided for creating an object to ensure they conform to expected types and values.

Role of `self` Keyword

Represents the instance of the class and allows access to instance attributes and methods within the class’s scope.
Essential for distinguishing between instance variables and local variables.

Primary Focus of Object-Oriented Programming (OOP)

Centered on organizing code into reusable and modular classes and objects for better data management and application structure.

Characteristics of an Object in OOP

Encapsulation: Bundling data and methods that operate on that data within the same unit.
State and behavior: An object has specific attributes (states) and actions (methods).

Blueprint for an Object in OOP

A class serves as a blueprint, defining the structure and behaviors that its objects will have.

Definition of an Object (Instance) in OOP

An object is a specific instantiation of a class, holding the state defined by the class attributes.

Function Executed When Class is Initiated

The __init__() function is always executed to initialize the new object.

DRY Acronym in OOP Context

Stands for "Don't Repeat Yourself," emphasizing the importance of avoiding code duplication to enhance maintainability and clarity.

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Description

Explore the concept of Object-Oriented Programming (OOP) in Python. Learn about creating objects, attributes, and behaviors in Python's multi-paradigm programming language.