Library Catalog

You are working on a program to manage a library catalog. Implement a Python class called Library that represents a library. The Library class should have the following features:

1. An attribute catalog that is a dictionary representing the library catalog. The keys are book titles, and the values are the corresponding authors.

2. Implement the __init__ method to initialize the library with an empty catalog.

3. Implement the add_book method that takes a book title and an author as arguments and adds the book to the catalog.

4. Implement the remove_book method that takes a book title as an argument and removes the book from the catalog.

5. Implement the get_author method that takes a book title as an argument and returns the author of that book.

Example Usage:

# Create a library
my_library = Library()

# Add books to the catalog
my_library.add_book("Thirukural", "Thiruvalluvar")
my_library.add_book("SS Nair", "Ramaguru Radhakrishnan")

# Print the catalog
print(my_library.catalog)
# Output: {'Thirukural': 'Thiruvalluvar', 'SS Nair': 'Ramaguru Radhakrishnan'}

# Get the author of a specific book
author = my_library.get_author("SS Nair")
print(author)
# Output: Ramaguru Radhakrishnan

# Remove a book from the catalog
my_library.remove_book("SS Nair")

# Print the updated catalog
print(my_library.catalog)
# Output: {'Thirukural': 'Thiruvalluvar'}

Testcases

Input 1

1
Thirukural
Thiruvalluvar
1
SS Nair
Ramaguru Radhakrishnan
4
5

Output 1

Book 'Thirukural' by Thiruvalluvar has been added to the catalog.
Book 'SS Nair' by Ramaguru Radhakrishnan has been added to the catalog.
Library Catalog:
1. Thirukural by Thiruvalluvar
2. SS Nair by Ramaguru Radhakrishnan
Exiting the Library Management System. Goodbye!

Input 2

1
Thirukural
Thiruvalluvar
1
SS Nair
Ramaguru Radhakrishnan
4
2
SS Nair
4
5

Output 2

Book 'Thirukural' by Thiruvalluvar has been added to the catalog.
Book 'SS Nair' by Ramaguru Radhakrishnan has been added to the catalog.
Library Catalog:
1. Thirukural by Thiruvalluvar
2. SS Nair by Ramaguru Radhakrishnan
Book 'SS Nair' has been removed from the catalog.
Library Catalog:
1. Thirukural by Thiruvalluvar
Exiting the Library Management System. Goodbye!

Input 3

1
Thirukural
Thiruvalluvar
1
SS Nair
Ramaguru Radhakrishnan
3
Thirukural
5

Output 3

Book 'Thirukural' by Thiruvalluvar has been added to the catalog.
Book 'SS Nair' by Ramaguru Radhakrishnan has been added to the catalog.
The author of 'Thirukural' is: Thiruvalluvar
Exiting the Library Management System. Goodbye!