- sanitize async library import location

src/ZEO/asyncio/base.py

-from .._compat import PY3
-
-if PY3:
-    import asyncio
-else:
-    import trollius as asyncio
-
 import logging
 import socket
 from struct import unpack
 import sys
 
+from .compat import asyncio
+
+
 logger = logging.getLogger(__name__)
 
 INET_FAMILIES = socket.AF_INET, socket.AF_INET6

src/ZEO/asyncio/testing.py

-from .._compat import PY3
+from .compat import asyncio
 
-if PY3:
-    import asyncio
-else:
-    import trollius as asyncio
 
 try:
     ConnectionRefusedError

src/ZEO/asyncio/tests.py

 from .._compat import PY3
 
 if PY3:
-    import asyncio
-
     def to_byte(i):
         return bytes([i])
 else:
-    import trollius as asyncio  # NOQA: F401 unused import
-
     def to_byte(b):
         return b