import sys

import threading

from types import TracebackType

from typing import Awaitable, Dict, List, Optional, Tuple, Type, Union

from typing import Awaitable, Dict, List, Optional, Set, Tuple, Type, Union

from ._cache import DNSCache

from ._dns import DNSQuestion, DNSQuestionType

from ._transport import _WrappedTransport

from ._updates import RecordUpdateListener

from ._utils.asyncio import (

_resolve_all_futures_to_none,

await_awaitable,

get_running_loop,

run_coro_with_timeout,

shutdown_loop,

wait_event_or_timeout,

wait_for_future_set_or_timeout,

)

from ._utils.name import service_type_name

from ._utils.net import (

self.query_handler = QueryHandler(self.registry, self.cache, self.question_history)

self.record_manager = RecordManager(self)

self.notify_event: Optional[asyncio.Event] = None

self._notify_futures: Set[asyncio.Future] = set()

self.loop: Optional[asyncio.AbstractEventLoop] = None

self._loop_thread: Optional[threading.Thread] = None

"""Start Zeroconf."""

self.loop = get_running_loop()

if self.loop:

self.notify_event = asyncio.Event()

self.engine.setup(self.loop, None)

return

self._start_thread()

def _run_loop() -> None:

self.loop = asyncio.new_event_loop()

asyncio.set_event_loop(self.loop)

self.notify_event = asyncio.Event()

self.engine.setup(self.loop, loop_thread_ready)

self.loop.run_forever()

async def async_wait(self, timeout: float) -> None:

"""Calling task waits for a given number of milliseconds or until notified."""

assert self.notify_event is not None

await wait_event_or_timeout(self.notify_event, timeout=millis_to_seconds(timeout))

loop = self.loop

assert loop is not None

await wait_for_future_set_or_timeout(loop, self._notify_futures, timeout)

def notify_all(self) -> None:

"""Notifies all waiting threads and notify listeners."""

def async_notify_all(self) -> None:

"""Schedule an async_notify_all."""

assert self.notify_event is not None

self.notify_event.set()

self.notify_event.clear()

notify_futures = self._notify_futures

if notify_futures:

_resolve_all_futures_to_none(notify_futures)

def get_service_info(

self, type_: str, name: str, timeout: int = 3000, question_type: Optional[DNSQuestionType] = None