python/oop.py at master · Gabobe15/python · GitHub

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""" class Book:
    def __init__(self, title, quantity, author, price):
        self.title = title
        self.quantity = quantity
        self.author = author
        self.price = price
        self.discount = 0.10

    def __repr__(self):
        return f"Book: {self.title}, Quantity: {self.quantity}, Author: {self.author}, Price: {self.price}"


book1 = Book('River between', 12, 'Ngugi wa thiongo', 120)
book2 = Book('Utengano', 18, 'Bin Abdalla', 220)
book3 = Book('Mayai, waziri wa marathi', 28, 'Author 3', 320)


print(book1)
print(book1.author)
print(book1.discount) """


class Book:
    def __init__(self, title, quantity, author, price):
        self.title = title
        self.quantity = quantity
        self.author = author
        self.__price = price
        self.__discount = None

    def set_discount(self, discount):
      self.__discount = discount

    def get_price(self):
      if self.__discount:
          return self.__price * (1-self.__discount)
      return self.__price

    def __repr__(self):
        return f"Book: {self.title}, Quantity: {self.quantity}, Author: {self.author}, Price: {self.get_price()}"


single_book = Book('Two States', 1, 'Chetan Bhagat', 200)
print(single_book)

bulk_books = Book('Two States', 25, 'Chetan Bhagat', 200)
bulk_books.set_discount(0.20)
print(bulk_books)