authors_chain.py

books = get_book_row_generator_from_csv('mybooks.csv')

formatted_books = (
    conduit(books)
        .map(Book.from_row)
        .filter(lambda book: book.year >= 1950)
        .sort(lambda book: (book.year, book.author_name.lower()))
        .map('{0.title} | {0.author} ({0.year})'.format)
        .to_list()
)