Write the function in Python please Provide explanations for each line of code Provide snapshot of code simple books txt QS12 03 001,The Lord Of The Rings QK12 04 002,The Hitchhiker's Guide To The Galaxy QS12 02 003,The Dune Chronicles QA12 04 004,A Song Of Ice And Fire Series QS12 01 005,The Foundation Trilogy Question 1 a) Define a class named MyLibrary which represents a simple library system The simple library system should allow people to borrow, return and search for books in the collection It also provides the functionalities such as displaying the list of available books and a list of on loan books, etc The MyLibrary class contains A private data field named name that defines the name of a library A private data field named books list that defines a list of the Book objects in the library A constructor initializer that takes a name and a filename as parameters (default of empty string) If the filename is not an empty string, the method should load all the books from a text file into the books list of the library system Download the sample text files from here If the file does not exist, an error message is displayed as in the example below After loading all the books into the books list, the method should print the number of books loaded as in the example below The show all books(self) method which prints out all the books in the collection as shown in the example below Test Result library MyLibrary('MyLibrary','simple books txt') print() library show all books() 5 books loaded The Lord Of The Rings, QS12 03 001 (Available) The Hitchhiker's Guide To The Galaxy, QK12 04 002 (Available) The Dune Chronicles, QS12 02 003 (Available) A Song Of Ice And Fire Series, QA12 04 004 (Available) The Foundation Trilogy, QS12 01 005 (Available) library MyLibrary('MyLibrary','input file txt') library show all books() ERROR The file 'input file txt' does not exist Question 1 b) Extend the MyLibrary class by implementing the following methods The find available book(self, code) method which takes a book code as a parameter and searches through the collection of books based on a given code If the book is found and it is available, the method should return the Book object, and Noneotherwise The borrow book(self, code, borrower name) method which takes a book code and a name of the borrower as parameters The method should search for the book in the books list If the book is available, the method should issue the book to the borrower by calling the borrow book() method on the Book and print a message as in the example below If the book is NOT available, the method should print ERROR could not issue the book 'XXX' where XXX indicates the book code Test Result library MyLibrary('MyLibrary', 'simple books txt') print(library find available book('QS12 02 003')) print(library find available book('003')) 5 books loaded The Dune Chronicles, QS12 02 003 (Available) None library MyLibrary('MyLibrary','simple books txt') library borrow book('QS12 02 003', 'Michael') library borrow book('003', 'Michael') 5 books loaded 'The Dune Chronicles' is issued to Michael successfully ERROR could not issue the book '003' library MyLibrary('MyLibrary','simple books txt') library borrow book('QS12 02 003', 'Michael') library borrow book('QS12 02 003', 'May') print() library show all books() 5 books loaded 'The Dune Chronicles' is issued to Michael successfully ERROR could not issue the book 'QS12 02 003' The Lord Of The Rings, QS12 03 001 (Available) The Hitchhiker's Guide To The Galaxy, QK12 04 002 (Available) The Dune Chronicles, QS12 02 003 (On Loan) A Song Of Ice And Fire Series, QA12 04 004 (Available) The Foundation Trilogy, QS12 01 005 (Available) library MyLibrary('MyLibrary','simple books txt') library borrow book('QS12 02 003', 'Michael') library borrow book('003', 'Michael') print(library find available book('QS12 02 003')) print(library find available book('003')) 5 books loaded 'The Dune Chronicles' is issued to Michael successfully ERROR could not issue the book '003' None None Question 1 c) Extend the MyLibrary class by implementing the following methods The find on loan book(self, code) method which takes a book code as a parameter and and searches through the collection of books based on the parameter code If the book is found and it is on loan, the method should return the Book object, and None otherwise The return book(self, code) method which takes a book code as a parameter and searches through the collection of books based on the parameter code If the book is on loan, the method should return the book and print a message as in the example below If the book is not on loan or cannot be found, the method should print ERROR could not return the book XXX where XXX indicates the book code Test Result library MyLibrary('MyLibrary', 'simple books txt') library borrow book('QS12 02 003', 'Michael') library return book('QS12 02 003') print(library find available book('QS12 02 003')) 5 books loaded 'The Dune Chronicles' is issued to Michael successfully 'QS12 02 003' is returned successfully The Dune Chronicles, QS12 02 003 (Available) library MyLibrary('MyLibrary', 'simple books txt') library return book('QS12 02 003') library return book('003') 5 books loaded ERROR could not return the book 'QS12 02 003' ERROR could not return the book '003' Question 1 d) Extend the MyLibrary class by implementing the following methods The show available books(self) method which prints all the available books in the library system The show on loan books(self) method which prints all the on loan books in the library system Test Result library MyLibrary('MyLibrary', 'simple books txt') library borrow book('QS12 02 003', 'Michael') library borrow book('QK12 04 002', 'Michael') print( Available books ) library show available books() print( On loan books ) library show on loan books() 5 books loaded 'The Dune Chronicles' is issued to Michael successfully 'The Hitchhiker's Guide To The Galaxy' is issued to Michael successfully Available books The Lord Of The Rings, QS12 03 001 (Available) A Song Of Ice And Fire Series, QA12 04 004 (Available) The Foundation Trilogy, QS12 01 005 (Available) On loan books The Hitchhiker's Guide To The Galaxy, QK12 04 002 (On Loan) The Dune Chronicles, QS12 02 003 (On Loan)

The Answer is in the image, click to view ...

Answered step by step

Verified Expert Solution

Link Copied!

Question

1 Approved Answer

Posted on Sep 22, 2024

Write the function in Python please Provide explanations for each line of code Provide snapshot of code simple_books.txt QS12.03.001,The Lord Of The Rings QK12.04.002,The Hitchhiker's

Write the function in Python please Provide explanations for each line of code Provide snapshot of code

simple_books.txt

QS12.03.001,The Lord Of The Rings QK12.04.002,The Hitchhiker's Guide To The Galaxy QS12.02.003,The Dune Chronicles QA12.04.004,A Song Of Ice And Fire Series QS12.01.005,The Foundation Trilogy

Question 1 a) Define a class named MyLibrary which represents a simple library system. The simple library system should allow people to borrow, return and search for books in the collection. It also provides the functionalities such as displaying the list of available books and a list of on-loan books, etc. The MyLibrary class contains:

A private data field named __name that defines the name of a library.
A private data field named __books_list that defines a list of the Book objects in the library.
A constructor/initializer that takes a name and a filename as parameters (default of empty string). If the filename is not an empty string, the method should load all the books from a text file into the books list of the library system. Download the sample text files from here.
- If the file does not exist, an error message is displayed as in the example below.
- After loading all the books into the books list, the method should print the number of books loaded as in the example below.
The show_all_books(self) method which prints out all the books in the collection as shown in the example below.

Test

Result

library = MyLibrary('MyLibrary','simple_books.txt') print() library.show_all_books()

5 books loaded. The Lord Of The Rings, QS12.03.001 (Available) The Hitchhiker's Guide To The Galaxy, QK12.04.002 (Available) The Dune Chronicles, QS12.02.003 (Available) A Song Of Ice And Fire Series, QA12.04.004 (Available) The Foundation Trilogy, QS12.01.005 (Available)

library = MyLibrary('MyLibrary','input_file.txt') library.show_all_books()

ERROR: The file 'input_file.txt' does not exist.

Question 1 b)

Extend the MyLibrary class by implementing the following methods:

The find_available_book(self, code) method which takes a book code as a parameter and searches through the collection of books based on a given code. If the book is found and it is available, the method should return the Book object, and Noneotherwise.
The borrow_book(self, code, borrower_name) method which takes a book code and a name of the borrower as parameters. The method should search for the book in the books list. If the book is available, the method should issue the book to the borrower by calling the borrow_book() method on the Book and print a message as in the example below. If the book is NOT available, the method should print: "ERROR: could not issue the book: 'XXX'" where XXX indicates the book code.

Test	Result
library = MyLibrary('MyLibrary', 'simple_books.txt') print(library.find_available_book('QS12.02.003')) print(library.find_available_book('003'))	5 books loaded. The Dune Chronicles, QS12.02.003 (Available) None
library = MyLibrary('MyLibrary','simple_books.txt') library.borrow_book('QS12.02.003', 'Michael') library.borrow_book('003', 'Michael')	5 books loaded. 'The Dune Chronicles' is issued to Michael successfully. ERROR: could not issue the book: '003'.
library = MyLibrary('MyLibrary','simple_books.txt') library.borrow_book('QS12.02.003', 'Michael') library.borrow_book('QS12.02.003', 'May') print() library.show_all_books()	5 books loaded. 'The Dune Chronicles' is issued to Michael successfully. ERROR: could not issue the book: 'QS12.02.003'. The Lord Of The Rings, QS12.03.001 (Available) The Hitchhiker's Guide To The Galaxy, QK12.04.002 (Available) The Dune Chronicles, QS12.02.003 (On Loan) A Song Of Ice And Fire Series, QA12.04.004 (Available) The Foundation Trilogy, QS12.01.005 (Available)
library = MyLibrary('MyLibrary','simple_books.txt') library.borrow_book('QS12.02.003', 'Michael') library.borrow_book('003', 'Michael') print(library.find_available_book('QS12.02.003')) print(library.find_available_book('003'))	5 books loaded. 'The Dune Chronicles' is issued to Michael successfully. ERROR: could not issue the book: '003'. None None

Question 1 c)

Extend the MyLibrary class by implementing the following methods:

The find_on_loan_book(self, code) method which takes a book code as a parameter and and searches through the collection of books based on the parameter code. If the book is found and it is on loan, the method should return the Book object, and None otherwise.
The return_book(self, code) method which takes a book code as a parameter and searches through the collection of books based on the parameter code. If the book is on loan, the method should return the book and print a message as in the example below. If the book is not "on loan" or cannot be found, the method should print "ERROR: could not return the book: XXX" where XXX indicates the book code.

Test

Result

library = MyLibrary('MyLibrary', 'simple_books.txt') library.borrow_book('QS12.02.003', 'Michael') library.return_book('QS12.02.003') print(library.find_available_book('QS12.02.003'))

5 books loaded. 'The Dune Chronicles' is issued to Michael successfully. 'QS12.02.003' is returned successfully. The Dune Chronicles, QS12.02.003 (Available)

library = MyLibrary('MyLibrary', 'simple_books.txt') library.return_book('QS12.02.003') library.return_book('003')

5 books loaded. ERROR: could not return the book: 'QS12.02.003'. ERROR: could not return the book: '003'.

Question 1 d)

Extend the MyLibrary class by implementing the following methods:

The show_available_books(self) method which prints all the available books in the library system.
The show_on_loan_books(self) method which prints all the on loan books in the library system.

Test

Result

library = MyLibrary('MyLibrary', 'simple_books.txt') library.borrow_book('QS12.02.003', 'Michael') library.borrow_book('QK12.04.002', 'Michael') print("Available books:") library.show_available_books() print("On loan books:") library.show_on_loan_books()

5 books loaded. 'The Dune Chronicles' is issued to Michael successfully. 'The Hitchhiker's Guide To The Galaxy' is issued to Michael successfully. Available books: The Lord Of The Rings, QS12.03.001 (Available) A Song Of Ice And Fire Series, QA12.04.004 (Available) The Foundation Trilogy, QS12.01.005 (Available) On loan books: The Hitchhiker's Guide To The Galaxy, QK12.04.002 (On Loan) The Dune Chronicles, QS12.02.003 (On Loan)