Had a link to autopep8

doc/developers/index.rst

@@ -166,6 +166,11 @@ You can also check for common programming errors with the following tools:
         $ pip install pep8
         $ pep8 path/to/module.py
 
+    * AutoPEP8 can help you fix some of the easy redundant errors::
+
+        $ pip install autopep8
+        $ autopep8 path/to/pep8.py
+
 Bonus points for contributions that include a performance analysis with
 a benchmark script and profiling output (please report on the mailing
 list or on the GitHub wiki).