[3.6] Fix python 3.8 warnings (#4264). (#4570)

aiohttp/connector.py

@@ -964,7 +964,7 @@ async def _create_direct_connection(
             hosts = await asyncio.shield(self._resolve_host(
                 host,
                 port,
-                traces=traces), loop=self._loop)
+                traces=traces))
         except OSError as exc:
             # in case of proxy it is not ClientProxyConnectionError
             # it is problem of resolving proxy ip itself

aiohttp/locks.py

@@ -18,7 +18,7 @@ class EventResultOrError:
     def __init__(self, loop: asyncio.AbstractEventLoop) -> None:
         self._loop = loop
         self._exc = None  # type: Optional[BaseException]
-        self._event = asyncio.Event(loop=loop)
+        self._event = asyncio.Event()
         self._waiters = collections.deque()  # type: Deque[asyncio.Future[Any]]
 
     def set(self, exc: Optional[BaseException]=None) -> None:

aiohttp/web_server.py

@@ -50,7 +50,7 @@ def _make_request(self, message: RawRequestMessage,
 
     async def shutdown(self, timeout: Optional[float]=None) -> None:
         coros = [conn.shutdown(timeout) for conn in self._connections]
-        await asyncio.gather(*coros, loop=self._loop)
+        await asyncio.gather(*coros)
         self._connections.clear()
 
     def __call__(self) -> RequestHandler:

tests/test_loop.py

@@ -13,7 +13,7 @@
 async def test_subprocess_co(loop) -> None:
     assert isinstance(threading.current_thread(), threading._MainThread)
     proc = await asyncio.create_subprocess_shell(
-        "exit 0", loop=loop, stdin=asyncio.subprocess.DEVNULL,
+        "exit 0", stdin=asyncio.subprocess.DEVNULL,
         stdout=asyncio.subprocess.DEVNULL, stderr=asyncio.subprocess.DEVNULL)
     await proc.wait()
 

tests/test_web_protocol.py

@@ -835,10 +835,7 @@ async def handler(request):
     app.router.add_route('POST', '/', handler)
     server = await aiohttp_server(app, logger=logger)
 
-    if helpers.PY_38:
-        writer = await asyncio.connect('127.0.0.1', server.port)
-    else:
-        _, writer = await asyncio.open_connection('127.0.0.1', server.port)
+    _, writer = await asyncio.open_connection('127.0.0.1', server.port)
     writer.write("""POST / HTTP/1.1\r
 Connection: keep-alive\r
 Content-Length: 10\r