from abc import ABCMeta
class Product(metaclass=ABCMeta):
    def return_policy(self):
        print("From Base Class")
 
class Furniture(Product):
    pass
 
class Mobile(Product):
    def return_policy(self):
        print("All mobiles must be returned within 10 days of purchase")
 
class Shoe(Product):
    def return_policy(self):
        print("All shoes must be returned within 7 days of purchase")
 
s=Furniture()
s.return_policy()
 

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