text.py 文件源码

def process_tag(tag, valid_tags=()):
    if isinstance(tag, NavigableString):
        return tag

    if tag.name in valid_tags:
        for subtag in tag.contents:
            subtag.replaceWith(process_tag(subtag, valid_tags))
        return tag
    else:
        result = ""
        for subtag in tag.contents:
            result += str(process_tag(subtag, valid_tags))
        return result