A beginner-friendly Python project that demonstrates polymorphism in Object-Oriented Programming by implementing multiple payment methods with a shared interface.
The Payment System models real-world payment methods using a common Payment base class.
Different payment types such as Cash, Card, and UPI implement the same pay() method but behave differently at runtime.
This project clearly shows how polymorphism allows the same method call to produce different outcomes depending on the object type.
- Polymorphism
- Method overriding
- Base and derived classes
- Runtime method dispatch
- Unified payment interface
- Multiple payment methods (Cash, Card, UPI)
- Clean and extendable design
- Easy to add new payment types
- Language: Python 3
- Programming Paradigm: Object-Oriented Programming (OOP)
python payment_system.py