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1. Create Class & Object2. Instance vs Class Variables3. Constructors in Python Classes4. Single Inheritance5. Multiple Inheritance6. Multilevel Inheritance7. Polymorphism with Methods8. Method Overloading Simulation9. Encapsulation with Getters/Setters10. Abstraction with ABC11. Operator Overloading12. Custom Iterator13. Class Methods14. Static Methods15. Composition Example16. Aggregation Example17. Private Variables18. Magic Methods Overview19. Object Cloning20. Custom Exceptions21. Class Decorator22. Prototype Pattern23. Singleton Pattern24. MRO (Method Resolution Order) Demo25. Polymorphism (Duck Typing)

Single Inheritance in Python

Dog(Animal) can speak() without defining it. That is the whole inheritance pitch.

BeginnerObject-Oriented ProgramsExample 4 of 25
single-inheritance.py
1# Program to demonstrate single inheritance
2

3class Animal:
4    def speak(self):
5        print("Animal makes a sound")
6

7class Dog(Animal):
8    def bark(self):
9        print("Dog barks")
10

11dog = Dog()
12dog.speak()
13dog.bark()

Output

Animal makes a sound
Dog barks

What's going on

Dog inherits from Animal, so instances of Dog can call both 'speak' and 'bark'.

After this program

If the idea is still fuzzy, read Day 11: Classes and Objects in the Python course. For a short check, try the Python quiz (300 questions). Stay with all 25 object-oriented programs, or see every topic on Python exercises.

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