archive = zipfile.ZipFile(temp, 'w')
for book in models.Book.tagged.with_all(shelf):
if book.pdf_file:
filename = book.pdf_file.path
archive = zipfile.ZipFile(temp, 'w')
for book in models.Book.tagged.with_all(shelf):
if book.pdf_file:
filename = book.pdf_file.path