PEP8 formatting cleanups.

setup.cfg

@@ -1,6 +1,7 @@
 [flake8]
 max-line-length = 200
 
+# E402, module level import not at top of file
 # E501, line too long
 # F401, module imported but unused
-ignore = E501, F401
+ignore = E402, E501, F401