Example of refactoring using rope library.

tools/telemetry/telemetry/internal/story_runner_unittest.py

Index: tools/telemetry/telemetry/internal/story_runner_unittest.py
diff --git a/tools/telemetry/telemetry/internal/story_runner_unittest.py b/tools/telemetry/telemetry/internal/story_runner_unittest.py
index 65959c76279993ba25746024c109d046028d2074..ac26acf57fda61ec29c7436331149056224df904 100644
--- a/tools/telemetry/telemetry/internal/story_runner_unittest.py
+++ b/tools/telemetry/telemetry/internal/story_runner_unittest.py
@@ -175,18 +175,18 @@ class StoryRunnerTest(unittest.TestCase):
     # UserStorySet's are only allowed to have one SharedState.
     us = SetupUserStorySet(False, foo_states)
     story_groups = (
-        story_runner.StoriesGroupedByStateClass(
+        story_runner.StoriesByStateClass(
             us, False))
     self.assertEqual(len(story_groups), 1)
     us = SetupUserStorySet(False, mixed_states)
     self.assertRaises(
         ValueError,
-        story_runner.StoriesGroupedByStateClass,
+        story_runner.StoriesByStateClass,
         us, False)
     # BaseUserStorySets are allowed to have multiple SharedStates.
     bus = SetupUserStorySet(True, mixed_states)
     story_groups = (
-        story_runner.StoriesGroupedByStateClass(
+        story_runner.StoriesByStateClass(
             bus, True))
     self.assertEqual(len(story_groups), 3)
     self.assertEqual(story_groups[0].shared_state_class,