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Python Object-Oriented Python Advanced Objects Constructicons

Kohei Ashida
Kohei Ashida
4,882 Points
Posted by Kohei Ashida
Kohei Ashida
4,882 Points

Why don't you need to import Book class?

In this video, why did Kenneth only import Bookcase class not with Book class as well? I couldn't understand why this command worked without importing Book class.

>>> from books import Bookcase                                                                                                                                            
>>> bc = Bookcase.create_bookcase([('Moby-Dick', 'Herman Melville'), ('Jungle Book', 'Rudyard Kipling')])                                                                 
>>> str(bc.books[0])                                                                                                                                                      
'Moby-Dick by Herman Melville'

Is that because the Book class is called in the create_bookcase function below?

class Bookcase:
    def __init__(self, books=None):
        self.books = books

    @classmethod
    def create_bookcase(cls, book_list):
        books = []
        for title, author in book_list:
            books.append(Book(title, author))
        return cls(books)

Thanks!

2 Answers

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

You're exactly right, "Bookcase" is imported with its dependencies are resolved.

However, you'd need a separate "import" if you wanted to reference "Book" directly.