Please follow PEP8 with regard to coding style.
-All functionality should be available in pure Python. C replacements may
-be written for performance reasons, but should never replace the Python
-implementation.
+All functionality should be available in pure Python. Optional C
+implementations may be written for performance reasons, but should never
+replace the Python implementation. The C implementations should follow the
+kernel/git coding style.
+
+Where possible please include updates to NEWS along with your improvements.