[kovidgoyal]

yes they do. combine them all into one if you dont care about order with this function

def prefixed_classes(classes):
    q = frozenset(classes.split(' '))

    def matcher(x):
        if x:
            for candidate in frozenset(x.split()):
                for x in q:
                    if candidate.startswith(x):
                        return True
        return False
    return {'attrs': {'class': matcher}}

keep_onlly_tags = [prefixed_classes('prefix1 prefix2 prefix3')]