Relax pycodestyle: import only allowed at the top

While this is a really good convention, sometimes one must import
stuff inside a try except block. This block is still at the top, but pycodestyle
treats like it isn't, because it's in an idented block, and the outeer scope.

kubernetes/utils/create_from_yaml.py

@@ -15,9 +15,9 @@
 import sys
 
 if sys.version_info.major < 3:
-    from StringIO import StringIO
+    from StringIO import StringIO  # noqa: F406
 else:
-    from io import StringIO
+    from io import StringIO  # noqa: F406
 
 from os import path