def handleDuplicate(acc: Iterable[MetadataItem],
pair: MetadataItem) -> Iterable[MetadataItem]:
name: str = first(pair)
tag: Optional[Tag] = tagByName(tags, name)
seenTagNames: Iterator[str] = map(first, acc)
# Throw away pair if it has the same tag name as some already seen, known, unique directive:
return acc if tag is not None and tag.unique and name in seenTagNames else list(
acc) + [pair]
def withoutSurroundingSlashes(s: str) -> str:
return first(re.subn(re.compile(r"^\/|\/$"), "", s))
def valueGetter_all(metadata: Metadata) -> Callable[[Tag], List[TagValue]]:
return lambda tag: [
second(pair) for pair in metadata if first(pair) == tag.name
]