def on_reload():
env = Env()
env.read_env()
folder = env('FOLDER', default='pages')
books_per_page = env.int('BOOKS_PER_PAGE', default=10)
books_per_col = int(books_per_page / 2)
env = Environment(loader=FileSystemLoader('.'),
autoescape=select_autoescape(['html', 'xml']))
template = env.get_template('template.html')
pages_count, chunked_books = get_books('books.json', books_per_page)
os.makedirs(folder, exist_ok=True)
for page_number, books_on_page in enumerate(chunked_books, 1):
first_col_books, second_col_books = more_itertools.chunked(
books_on_page, math.ceil(len(books_on_page) / 2))
render_page(template, pages_count, page_number, first_col_books,
second_col_books, folder)
