Untitled

class Product:

    next_number = 1

    @classmethod
    def get_next_number(cls):
        val = cls.next_number
        cls.next_number += 1
        return val

    def __init__(self, name: str, price: float):
        self.name = name
        self.price = price
        self.serial_number = Product.get_next_number()

    def advertise(self):
        msg = f'Lovely {self.name} for only {self.price} $'
        return msg

    def apply_discount(self, percentage):
        self.price -= self.price * (percentage / 100)

    def __str__(self):
        return f'{self.name} with {self.price} $'

    def __eq__(self, other):
        if not isinstance(other, Product):
            return False

        return self.name == other.name and self.price == other.price




cheese = Product('Cheese', 12.00)
cheese1 = Product('Cheese', 12.00)
print(cheese == cheese1)
print(cheese != cheese1)
print(cheese == "cheese")
wine = Product('Wine', 20.00)
chips = Product('Chips', 15.00)
print(cheese.price)
print(wine.price)
cheese.price = 9.00
print(cheese.price)
cheese.price = cheese.price * 2
print(cheese.price)
print(cheese.advertise())

wine.apply_discount(15)
print(wine.price)


print(wine.serial_number)
print(cheese.serial_number)
print(chips.serial_number)
print(Product.next_number)
print(wine)
print(chips)

print(cheese == cheese1)