IndexError: list index out of range

[leestorm4520]

I am using cashews in my fastapi application and whenever the endpoint returns an empty list, CacheEtagMiddleware wont be able to serialize it, resulting in IndexError: list index out of range.
_is_early_cache() should be  "return isinstance(data, list) and len(data) and isinstance(data[0], datetime) "

def _get_etag(cached_data: Any) -> str:
if _is_early_cache(cached_data):
cached_data = cached_data[1]
if not isinstance(cached_data, bytes):
cached_data = cached_data.body if isinstance(cached_data, Response) else DEFAULT_PICKLER.dumps(cached_data)
return blake2s(cached_data).hexdigest()

def _is_early_cache(data: Any) -> bool:
return isinstance(data, list) and isinstance(data[0], datetime)