Example of refactoring using rope library.

tools/telemetry/refactor.py

Index: tools/telemetry/refactor.py
diff --git a/tools/telemetry/refactor.py b/tools/telemetry/refactor.py
new file mode 100644
index 0000000000000000000000000000000000000000..405dd384c3047ff1f1900b3f79f85e7566476737
--- /dev/null
+++ b/tools/telemetry/refactor.py
@@ -0,0 +1,27 @@
+import os
+
+from telemetry.core import util
+
+util.AddDirToPythonPath(util.GetTelemetryDir(), 'third_party', 'rope')
+
+from rope.refactor import rename
+import rope.base.project
+
+
+telemetry_path = os.path.dirname(__file__)
+telemetry_project = rope.base.project.Project(telemetry_path)
+
+
+def Rename(resource, offset, new_name):
+  changes = rename.Rename(
+      telemetry_project, resource, offset).get_changes(new_name)
+  print changes.get_description()
+  telemetry_project.do(changes)
+
+user_story_file_path = os.path.join(
+    'telemetry', 'internal', 'story_runner.py')
+
+user_story_code = telemetry_project.get_resource(user_story_file_path)
+Rename(user_story_code,
+       user_story_code.read().index('def StoriesGroupedByStateClass') + 4,
+       'StoriesByStateClass')