bpo-32154: Remove asyncio.selectors (#4605)
* Remove asyncio.selectors and asyncio._overlapped symbols from the
namespace of the asyncio module
* Replace "from asyncio import selectors" with "import selectors"
* Replace "from asyncio import _overlapped" with "import _overlapped"
asyncio.selectors was added to support Python 3.3, which doesn't have
selectors in its standard library, and Python 3.4 in the same code
base. Same rationale for asyncio._overlapped. Python 3.3 reached its
end of life, and asyncio is no more maintained as a third party
module on PyPI.
diff --git a/Lib/asyncio/test_utils.py b/Lib/asyncio/test_utils.py
index c3ddfe3..f797b2f 100644
--- a/Lib/asyncio/test_utils.py
+++ b/Lib/asyncio/test_utils.py
@@ -6,6 +6,7 @@
import logging
import os
import re
+import selectors
import socket
import socketserver
import sys
@@ -28,7 +29,6 @@
from . import base_events
from . import events
from . import futures
-from . import selectors
from . import tasks
from .coroutines import coroutine
from .log import logger