Guido suggests alternative language for whitespace around operators.

pep-0008.txt

@@ -305,7 +305,11 @@ Other Recommendations
   ``>=``, ``in``, ``not in``, ``is``, ``is not``), Booleans (``and``,
   ``or``, ``not``).
 
-- Use spaces around arithmetic operators:
+- If operators with different priorities are used, consider adding
+  whitespace around the operators with the lowest priority(ies). Use
+  your own judgement; however, never use more than one space, and
+  always have the same amount of whitespace on both sides of a binary
+  operator.
 
   Yes::