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
Leslio McKeown
Python Development Techdegree Student 9,441 Pointsit keeps saying Bummer: AttributeError: 'BookCase' object has no attribute 'books'
Bummer: AttributeError: 'BookCase' object has no attribute 'books'
class Book:
def __init__(self, author, title):
self.author = author
self.title = title
def __str__(self):
return f'{self.author}, {self.title}'
def __eq__(self, other):
if self.author == other.author and self.title == other.title:
return True
else:
return False
from book import Book
class BookCase:
def add_books(self, book):
self.books.append(book)
def __iter__(self):
yield from self.books
2 Answers
Chris Freeman
Treehouse Moderator 68,457 PointsHey Leslio McKeown, the attribute books needs to be defined in the class BookCase.
Similar to the Book class, and an __init__ method to BookCase that sets self.books = []
Post back if you need more help. Good luck!!!
Leslio McKeown
Python Development Techdegree Student 9,441 Pointsthis doesn't seem to work it shows: Bummer: TypeError: init() missing 1 required positional argument: 'books'
class BookCase:
def __init__(self):
self.books = []
def add_books(self, book):
self.books.append(book)
def __iter__(self):
yield from self.books
[MOD: added ```python formatting -cf]
Chris Freeman
Treehouse Moderator 68,457 PointsWhen I pasted your code into the challenge, it passed for me.
Leslio McKeown
Python Development Techdegree Student 9,441 PointsLeslio McKeown
Python Development Techdegree Student 9,441 Pointsby defined is it self.books = books?
because I'm still not understanding it even after rewatching the videos
I'm getting a new error message: TypeError: init() missing 1 required positional argument: 'books'
Chris Freeman
Treehouse Moderator 68,457 PointsChris Freeman
Treehouse Moderator 68,457 PointsIn the
add_booksmethod,bookinstances are append toself.booksSo,self.booksshould be initialized as an empty set [].Create the missing
__init__method with theBookCaseclass.