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

Add a __eq__ method for this book class. It should check if the author and title of the book are the same and return tru

class Book: def init(self, author, title): self.author = author self.title = title

def __str__(self):
    return f"{self.author}, {self.title}"
book.py
class Book:
    def __init__(self, author, title):
        self.author = author
        self.title = title

    def __str__(self):
        return f"{self.author}, {self.title}"
bookcase.py
from book import Book


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

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

2 Answers

this part of the code is an error some how def eq(self, other): if isinstance(other, Book): return self.author == other.author and self.title == other.title return False

Travis Alstrand
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Travis Alstrand
Data Analysis Techdegree Graduate 49,304 Points

Hey there terencelewis ! :wave:

You're super close here! It just needs a little adjustment. The challenge reads "It should check if the author and title of the book are the same and return true if they are and false if they aren’t." So I believe the isinstance check you had in place is what was throwing the answer validation on the back end off.

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