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Python Basic Object-Oriented Python Emulating Built-ins Emulating Built-ins

Em Noble
Em Noble
6,967 Points

my code is functionally correct, yes?

??

book.py
class Book:
    def __init__(self, author, title):
        self.author = author
        self.title = title

    def __str__(self):
        return f'{self.author}, {self.title}'

book_one = Book('John Green', 'Paper Towns')

print (book_one)
bookcase.py
from book import Book


class BookCase:
    def __init__(self):
       self.books = []

    def add_books(self, book):
        self.books.append(book)

2 Answers

Megan Amendola
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree seal-36
Megan Amendola
Treehouse Teacher

Hi! You're right, all you need for the challenge is

def __str__(self):
        return f'{self.author}, {self.title}'

The challenge backend will test your code by creating an instance of the class and passing in authors and books, so you don't need:

book_one = Book('John Green', 'Paper Towns')

print (book_one)
Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,457 Points

Yes. your code is functionally correct. The checker is complaining about seeing a print statement (even if commented out) Extra prints and function calls can throw off the check when it sometimes uses a literal regex parse of the code to see what is present and not a functional or logical view of what is present.

:point_right: remove the print, and the assignment to book_one and the code will pass the challenge task.

Post back if you need more help. Good luck!!