if TYPE_CHECKING:

record = cast(_UniqueRecordsType, record)

maybe_entry = self._cache.async_get_unique(record)

return bool(maybe_entry and maybe_entry.is_recent(self._now))

return bool(maybe_entry is not None and maybe_entry.is_recent(self._now) is True)

def _has_mcast_record_in_last_second(self, record: DNSRecord) -> bool:

"""Check if an answer was seen in the last second.

if TYPE_CHECKING:

record = cast(_UniqueRecordsType, record)

maybe_entry = self._cache.async_get_unique(record)

return bool(maybe_entry and self._now - maybe_entry.created < _ONE_SECOND)

return bool(maybe_entry is not None and self._now - maybe_entry.created < _ONE_SECOND)

class QueryHandler:

dns_pointer = DNSPointer(

_SERVICE_TYPE_ENUMERATION_NAME, _TYPE_PTR, _CLASS_IN, _DNS_OTHER_TTL, stype, 0.0

)

if not known_answers.suppresses(dns_pointer):

if known_answers.suppresses(dns_pointer) is False:

answer_set[dns_pointer] = set()

def _add_pointer_answers(

# Add recommended additional answers according to

# https://tools.ietf.org/html/rfc6763#section-12.1.

dns_pointer = service._dns_pointer(None)

if known_answers.suppresses(dns_pointer):

if known_answers.suppresses(dns_pointer) is True:

continue

answer_set[dns_pointer] = {

service._dns_service(None),

seen_types.add(dns_address.type)

if dns_address.type != type_:

additionals.add(dns_address)

elif not known_answers.suppresses(dns_address):

elif known_answers.suppresses(dns_address) is False:

answers.append(dns_address)

missing_types: Set[int] = _ADDRESS_RECORD_TYPES - seen_types

if answers:

# Add recommended additional answers according to

# https://tools.ietf.org/html/rfc6763#section-12.2.

dns_service = service._dns_service(None)

if not known_answers.suppresses(dns_service):

if known_answers.suppresses(dns_service) is False:

answer_set[dns_service] = service._get_address_and_nsec_records(None)

if type_ in (_TYPE_TXT, _TYPE_ANY):

dns_text = service._dns_text(None)

if not known_answers.suppresses(dns_text):

if known_answers.suppresses(dns_text) is False:

answer_set[dns_text] = set()

return answer_set