Introduction to OOP's Class Object Constructor Instance Variables Class Variables Instance Methods self Keyword Encapsulation Public Members Protected Members Private Members Inheritance Single Inheritance Multiple Inheritance Multilevel Inheritance Hierarchical Inheritance Hybrid Inheritance super() Function Polymorphism Method Overriding Duck Typing Abstraction Abstract Class Abstract Method Class Method Static Method Special Methods _str_ Method Operator Overloading Composition Aggregation Association Method Resolution Order Object Class issubclass() and isinstance() Property Decorator Setter Method with @property Destructor Inner Class Complete Mini Example

@abstractmethod
def method_name(self):
    pass

from abc import ABC, abstractmethod

class Payment(ABC):
    @abstractmethod
    def pay(self):
        pass

class UPI(Payment):
    def pay(self):
        print("Payment through UPI")

p = UPI()
p.pay()

Payment through UPI