Method Overriding is a feature of Inheritance in Object-Oriented Programming (OOP).<\/p>\n\n\n\n
It allows a child class to provide a specific implementation of a method that is already defined in its parent class.<\/p>\n\n\n\n
In simple words:
The child class changes the behavior of a parent class method.<\/p>\n\n\n\n
class Animal:
def sound(self):
print(\"Animal makes a sound\")class Dog(Animal):
def sound(self):
print(\"Dog barks\")d = Dog()
d.sound()<\/pre>\n\n\n\nOutput:<\/p>\n\n\n\n
Dog barks<\/pre>\n\n\n\nHere:<\/p>\n\n\n\n
Dog<\/code> inherits from Animal<\/code><\/li>\n\n\n\n- The
sound()<\/code> method in Dog<\/code> overrides the parent method<\/li>\n\n\n\n- The child version runs instead of the parent version<\/li>\n<\/ul>\n\n\n\n
Using super() in Method Overriding<\/strong><\/h2>\n\n\n\nSometimes we want to use the parent method along with the child method.<\/p>\n\n\n\n
class Animal:
def sound(self):
print(\"Animal makes a sound\")class Dog(Animal):
def sound(self):
super().sound()
print(\"Dog barks\")d = Dog()
d.sound()<\/pre>\n\n\n\nOutput:<\/p>\n\n\n\n
Animal makes a sound
Dog barks<\/pre>\n\n\n\nsuper()<\/code> calls the parent class method.<\/p>\n\n\n\nRules of Method Overriding<\/strong><\/h2>\n\n\n\n\n- Method name must be the same<\/li>\n\n\n\n
- Parameters should be the same<\/li>\n\n\n\n
- Must use inheritance<\/li>\n\n\n\n
- Happens at runtime<\/li>\n<\/ul>\n\n\n\n
Example with Constructor Overriding<\/strong><\/h2>\n\n\n\nclass Person:
def __init__(self):
print(\"Person Constructor\")class Student(Person):
def __init__(self):
print(\"Student Constructor\")s = Student()<\/pre>\n\n\n\nOutput:<\/p>\n\n\n\n
Student Constructor<\/pre>\n\n\n\nThe child constructor overrides the parent constructor.<\/p>\n\n\n\n
To call parent constructor:<\/p>\n\n\n\n
class Student(Person):
def __init__(self):
super().__init__()
print(\"Student Constructor\")<\/pre>\n\n\n\nMethod Overriding vs Method Overloading<\/strong><\/h2>\n\n\n\nMethod Overriding
Same method name
Same parameters
Different implementation in child class
Requires inheritance<\/p>\n\n\n\n
Method Overloading
Same method name
Different parameters
Python supports it using default arguments<\/p>\n\n\n\n
Key Takeaway<\/strong><\/h2>\n\n\n\nMethod Overriding allows a child class to redefine a parent class method.<\/p>\n\n\n\n
It supports runtime polymorphism and makes OOP programs flexible and extensible.<\/p>\n\n\n