PEP8 fixes

lambdas and imports

tests/test_calib.py

@@ -1,7 +1,6 @@
 from amodem import calib
 from amodem import common
 from amodem import config
-config = config.fastest()
 
 from io import BytesIO
 
@@ -10,6 +9,8 @@ import random
 import pytest
 import mock
 
+config = config.fastest()
+
 
 class ProcessMock(object):
     def __init__(self):