def input(self):
print("========================================")
print("| Add Book |")
print("========================================")
title = input("Title : ")
author = input("Author : ")
price = input("Price : ")
copies = input("Copies : ")
price = float(price) if price.isnumeric() else 0
copies = int(price) if copies.isnumeric() else 0
return Book(title, Author(author), price, copies)
def __init__(self, title="", author=Author(), price=0, copies=0):
Publication.__init__(self, title, price, copies)
self.title = title
self.copies = copies
self.price = price
self.__author = author
def __init__(self, title="", author=Author(), price=0, copies=0):
self.publik = Publication(title, price, copies)
self.__author = author