Inheritance is one of the main concepts of Object-Oriented Programming (OOP).<\/p>\n\n\n\n
Inheritance allows one class to use the properties and methods of another class.<\/p>\n\n\n\n
In simple words:
Inheritance means creating a new class from an existing class.<\/p>\n\n\n\n
The existing class is called the Parent Class (Base Class)<\/strong>. The child class automatically gets access to the parent class methods and variables.<\/p>\n\n\n\n Output:<\/p>\n\n\n\n Here:<\/p>\n\n\n\n If the parent class has a constructor, we can call it using One child class inherits from one parent class.<\/p>\n\n\n\n One child class inherits from multiple parent classes.<\/p>\n\n\n\n A class inherits from a class that already inherited from another class.<\/p>\n\n\n\n Multiple child classes inherit from one parent class.<\/p>\n\n\n\n A child class can redefine a parent method.<\/p>\n\n\n\n Output:<\/p>\n\n\n\n The child method overrides the parent method.<\/p>\n\n\n\n Inheritance allows a class to reuse code from another class.
The new class is called the Child Class (Derived Class)<\/strong>.<\/p>\n\n\n\nWhy Use Inheritance?<\/strong><\/h2>\n\n\n\n
\n
Basic Syntax<\/strong><\/h2>\n\n\n\n
class Parent:
# parent class codeclass Child(Parent):
# child class code<\/pre>\n\n\n\nSimple Example<\/strong><\/h2>\n\n\n\n
class Person:
def greet(self):
print(\"Hello\")class Student(Person):
def study(self):
print(\"Studying\")s1 = Student()s1.greet()
s1.study()<\/pre>\n\n\n\nHello
Studying<\/pre>\n\n\n\n\n
Student<\/code> inherits from Person<\/code><\/li>\n\n\n\nStudent<\/code> can use greet()<\/code> method of Person<\/code><\/li>\n<\/ul>\n\n\n\nUsing Constructor in Inheritance<\/strong><\/h2>\n\n\n\n
super()<\/code>.<\/p>\n\n\n\nclass Person:
def __init__(self, name):
self.name = nameclass Student(Person):
def __init__(self, name, grade):
super().__init__(name)
self.grade = grades1 = Student(\"Hira\", \"A\")print(s1.name)
print(s1.grade)<\/pre>\n\n\n\nsuper()<\/code> calls the parent class constructor.<\/p>\n\n\n\nTypes of Inheritance<\/strong><\/h2>\n\n\n\n
1. Single Inheritance<\/h3>\n\n\n\n
2. Multiple Inheritance<\/h3>\n\n\n\n
class Father:
def skill1(self):
print(\"Gardening\")class Mother:
def skill2(self):
print(\"Cooking\")class Child(Father, Mother):
passc1 = Child()
c1.skill1()
c1.skill2()<\/pre>\n\n\n\n3. Multilevel Inheritance<\/h3>\n\n\n\n
4. Hierarchical Inheritance<\/h3>\n\n\n\n
Method Overriding<\/strong><\/h2>\n\n\n\n
class Animal:
def sound(self):
print(\"Some sound\")class Dog(Animal):
def sound(self):
print(\"Bark\")d1 = Dog()
d1.sound()<\/pre>\n\n\n\nBark<\/pre>\n\n\n\n
Key Takeaway<\/strong><\/h2>\n\n\n\n
It promotes code reusability, structure, and better organization in OOP programs.<\/p>\n\n\n