Day 13: Abstract Classes

• Instructions:
  • Given a Book class and a Solution class, write a MyBook class that does the following:
    • Inherits from Book
    • Has a parameterized constructor taking 3 parameters:
      • 2 strings title & author
      • int price
    • Implements the Book class’ abstract display() method so it prints 3 lines:
      • Title: instance title
      • Author: instance author
      • Price: instance price

Excercise

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from abc import ABCMeta, abstractmethod
class Book(object, metaclass=ABCMeta):
    def __init__(self,title,author):
        self.title=title
        self.author=author   
    @abstractmethod
    def display(): pass

#Write MyBook class

title=input()
author=input()
price=int(input())
new_novel=MyBook(title,author,price)
new_novel.display()

Solution

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from abc import ABCMeta, abstractmethod
class Book(object, metaclass=ABCMeta):
    def __init__(self,title,author):
        self.title=title
        self.author=author   
    @abstractmethod
    def display(): pass

#Write MyBook class
class MyBook(Book):
    def __init__(self,title,author,price):
        super().__init__(title,author)
        self.price = price
        
    def display(self):
        print("Title: {}".format(self.title))
        print("Author: {}".format(self.author))
        print("Price: {}".format(self.price))

title=input()
author=input()
price=int(input())
new_novel=MyBook(title,author,price)
new_novel.display()