pep-8 and small cleanups
diff --git a/serial/aio.py b/serial/aio.py
index 476959a..7e16545 100644
--- a/serial/aio.py
+++ b/serial/aio.py
@@ -17,6 +17,8 @@
 """
 import asyncio
 import serial
+import logger
+
 
 class SerialTransport(asyncio.Transport):
     def __init__(self, loop, protocol, serial_instance):
@@ -80,6 +82,7 @@
     #~ def write_eof(self):
     #~ def abort(self):
 
+
 @asyncio.coroutine
 def create_serial_connection(loop, protocol_factory, *args, **kwargs):
     ser = serial.Serial(*args, **kwargs)