proper usage of asyncio.wait() for first completed

kvmd/aiotools.py

@@ -28,8 +28,11 @@ import types
 
 import typing
 
+from typing import Tuple
 from typing import List
+from typing import Set
 from typing import Callable
+from typing import Awaitable
 from typing import Coroutine
 from typing import Type
 from typing import TypeVar
@@ -86,6 +89,10 @@ async def wait_infinite() -> None:
     await asyncio.get_event_loop().create_future()
 
 
+async def wait_first(*aws: Awaitable) -> Tuple[Set[asyncio.Future], Set[asyncio.Future]]:
+    return (await asyncio.wait(list(aws), return_when=asyncio.FIRST_COMPLETED))
+
+
 # =====
 async def afile_write_now(afile: aiofiles.base.AiofilesContextManager, data: bytes) -> None:
     await afile.write(data)