Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Madison Butler
Madison Butler
9,825 Points
Posted by Madison Butler
Madison Butler
9,825 Points

I keep trying to change this, but all I get back is Bummer: AttributeError: 'BookCase' object has no attribute 'book'

Not sure whats wrong

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

    def __str__(self):
        return "{}, {}".format(self.author, self.title)

    def __eq__(self, other):
        return self.author + self.title == other
bookcase.py 
from book import Book 

class BookCase:

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

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

    def __iter__(self):
        yield from self.book

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

Hey Madison! You are so close!

The last self.books in the __iter__ method has a typo (missing the ā€œsā€)

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