bsie.extractor.preview module# class bsie.extractor.preview.Preview(max_sides: Iterable[int])# Bases: Extractor Extract previews. CONTENT_READER: str | None = 'bsie.reader.preview.Preview'# extract(subject: Node, content: Callable[[int], Image], principals: Iterable[Predicate]) → Iterator[Tuple[Node, Predicate, Any]]# Return (node, predicate, value) triples.