13: Abstract Classes(python)
Abstract Classes
Task
Given a Book class and a Solution class, write a MyBook class that does the following:
- Inherits from Book
- Has a parameterized constructor taking these parameters:
- string
- string
- int
- Implements the Book class' abstract display() method so it prints these lines:
- , a space, and then the current instance's .
- , a space, and then the current instance's .
- , a space, and then the current instance's .
Note: Because these classes are being written in the same file, you must not use an access modifier (e.g.: ) when declaring MyBook or your code will not execute.
Input Format
You are not responsible for reading any input from stdin. The Solution class creates a Book object and calls the MyBook class constructor (passing it the necessary arguments). It then calls the display method on the Book object.
Output Format
The method should print and label the respective , , and of the MyBook object's instance (with each value on its own line) like so:
Title: $title
Author: $author
Price: $price
Note: The is prepended to variable names to indicate they are placeholders for variables.
Solution:
| class MyBook(Book): | |
| def __init__(self, title, author, price): | |
| super().__init__(title, author) | |
| self.price = price | |
| def display(self): | |
| print("Title:", self.title) | |
| print("Author:", self.author) | |
| print("Price:", self.price) | |
| title = input() | |
| author = input() | |
| price = int(input()) | |
| new_novel = MyBook(title, author, price) | |
| new_novel.display() |
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