Hello

Why Do We Use Inheritance?

Reasons

• Code reuse : We don’t have to write the same method again in child class.
• Easy updates : If we fix or improve something in the parent class, all child classes get it too.
• Custom behavior : We can add new things or change existing things in the child class.
• Real-world modeling : Example: A "Cat" is a "Animal", so it makes sense that Cat can inherit Animal's traits.

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What Happens Behind the Scenes?

Hello

When you do c.speak() (and c is an object of Child):

• Python first checks if the Child class has a speak() method.
• If not found, it goes to the Parent class.
• If still not found, it goes higher (if more parents exist).
• If not found anywhere, you get an error.

This is called the Method Resolution Order (MRO).

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Types of Inheritance in Python

• Single Inheritance
  Python first checks if the Child class has a speak() method.


• Multiple Inheritance
  One child class inherits from multiple parent classes.


• Multilevel Inheritance
  A class inherits from a class that already inherited another class.


• Hierarchical Inheritance
  Multiple child classes inherit from the same parent class.


• Hybrid Inheritance
  A combination of two or more types above.

We will study these after covering some more topics .