Example of refactoring using rope library.

tools/telemetry/telemetry/internal/story_runner.py

Index: tools/telemetry/telemetry/internal/story_runner.py
diff --git a/tools/telemetry/telemetry/internal/story_runner.py b/tools/telemetry/telemetry/internal/story_runner.py
index 7ddeaff62caa057da0a5dd36ce0486ed67f4a68d..ca6e24f5ec6e436e7d7f7817a59f637a2f81eca8 100644
--- a/tools/telemetry/telemetry/internal/story_runner.py
+++ b/tools/telemetry/telemetry/internal/story_runner.py
@@ -130,7 +130,7 @@ class UserStoryGroup(object):
     self._user_stories.append(user_story)
 
 
-def StoriesGroupedByStateClass(user_story_set, allow_multiple_groups):
+def StoriesByStateClass(user_story_set, allow_multiple_groups):
   """ Returns a list of user story groups which each contains user stories with
   the same shared_state_class.
 
@@ -197,7 +197,7 @@ def Run(test, user_story_set, expectations, finder_options, results,
   if effective_max_failures is None:
     effective_max_failures = max_failures
 
-  user_story_groups = StoriesGroupedByStateClass(
+  user_story_groups = StoriesByStateClass(
       user_stories,
       user_story_set.allow_mixed_story_states)