input: Write a python function to instantiate a Book object and retrieve its attributes.
  assert get_book_details('1984', 'George Orwell', 328, 'Secker & Warburg') == ('1984', 'George Orwell', 328, 'Secker & Warburg')
  assert get_book_details('To Kill a Mockingbird', 'Harper Lee', 281, 'J.B. Lippincott & Co.') == ('To Kill a Mockingbird', 'Harper Lee', 281, 'J.B. Lippincott & Co.')
  assert get_book_details('The Great Gatsby', 'F. Scott Fitzgerald', 218, 'Charles Scribner\'s Sons') == ('The Great Gatsby', 'F. Scott Fitzgerald', 218, 'Charles Scribner\'s Sons')
output: def get_book_details(title, author, pages, publisher):
      class Book:
          def __init__(self, title, author, pages, publisher):
              self.title = title
              self.author = author
              self.pages = pages
              self.publisher = publisher
  
      book = Book(title, author, pages, publisher)
      return (book.title, book.author, book.pages, book.publisher)