Question

Create a Python file (book.py) that has a class named Book.

Book class has four attributes, title (string), author(string), isbn(string), and year(int).

• Title - the name of the book.
• Author - the name of the persons who wrote the book.
• ISBN - is a unique 13 digit commercial book identifier.
• Year - the year the title was printed.

Your class should have the following methods:

(1) __init__(self, title, author, isbn, year): This method called when an object (book) is created from the class Book and it allows the class to initialize the attributes of a class.

(2) The Getter methods: Four different methods. Each method should return the value of an atrribute. The four methods are:

• get_title(self)
• get_author(self)
• get_isbn(self)
• get_year(self)

(3) The Setter methods: Four different methods. Each method should assign a new value to the attribute. The four methods are:

• set_title(self, value)
• set_author(self, value)
• set_isbn(self, value)
• set_year(self, value)

(4) __str__(self): This methid should return a string that has the book information. The string should look like the following:

Book Title    : Love Python
The Auther    : CUN students
Book ISBN     : 1234567890
Year Published: 2019

Answer 1

# -*- coding: utf-8 -*-
"""
Created on Tue Apr 16 12:09:34 2019

@author: KP
"""

#Class declaration starts here

class Book:
title = ''
author = ''
isbn = 0
year = 0
  
def __init__(self,title, author, isbn, year):
self.title = title
self.author = author
self.isbn = isbn
self.year = year
  
def get_title(self):
return self.title
  
def get_author(self):
return self.author
  
def get_isbn(self):
return self.isbn
  
def get_year(self):
return self.year
  
def set_title(self,value):
self.title = value
  
def set_author(self,value):
self.author = value
  
def set_isbn(self,value):
self.isbn = value
  
def set_year(self,value):
self.year = value
  
#__str__ function help us in returning any message directly in return statement
def __str__(self):
return "Book Title:"+"\t"+self.title+"\n"+\
"The Author:"+"\t"+self.author+"\n"+\
"Book ISBN:"+"\t"+str(self.isbn)+"\n"+\
"Year Published:"+"\t"+str(self.year)

#\ symbol is used to join current line to the next line

#Class declaration ends here

############Below is object declaration and functions calling###########
NewBook = Book('Start with What','Simon S.',1234567,2016)#Declaration of object NewBook

print("Printing the initial values of New Book function:")
print(NewBook)#__str__ function will be called

NewBook.set_title('Start with WHY')#set title using set_title function

NewBook.set_author('Simon sinek')#Set author name using set_authoer function

NewBook.set_isbn(987654)#Set isbn using set_isbn function

NewBook.set_year(2015)#Set year using set_year function

print("\n")#New line
print("Printing the new values of New Book function:")

print(NewBook)#Print the new values of NewBook object

####################################Output Image###################################

Printing the initial values of New Book function: Book Title: The Author: Book ISBN: Year Published: 2016 Start with What Simon S 1234567 Printing the new values of New Book function: Book Title: The Author: Book ISBN: Year Published: 2015 Start with WHY Simon sinek 987654