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Start your free trialTim Good
6,021 PointsWhy does it keep giving me this error; "Book is not defined"
I've tried everything on this task and it keeps giving me that same error.
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 isinstance(other, Book):
return self.author == other.author and self.title == other.title
return False
from book import Book
class BookCase:
def __init__(self):
self.books = []
def add_books(self, book):
self.books.append(book)
# Example usage
personal = Book("John Green", "Paper Towns")
print(personal) # Output: John Green, Paper Towns
bookcase = BookCase()
bookcase.add_books(personal)
print(bookcase.books) # Output: [John Green, Paper Towns]
1 Answer
Travis Alstrand
Data Analysis Techdegree Graduate 49,444 PointsWhat you have within the conditional works perfect for me on its own for this challenge. As far as I remember, using isinstance
is valid in this scenario so it must be how the backend of the challenge is running or what it's specifically looking for as an answer.
def __eq__(self, other):
return self.author == other.author and self.title == other.title