- info = BookInfo.from_string(xml_text)
- previous_book = slugs.get(info.slug, None)
- if previous_book:
+ info = BookInfo.from_bytes(xml_text)
+ previous_books = slugs.get(info.slug)
+ if previous_books:
+ if len(previous_books) > 1:
+ print self.style.ERROR("There is more than one book "
+ "with slug %s:"),
+ previous_book = previous_books[0]