Example of refactoring using rope library.

tools/telemetry/third_party/rope/rope/base/pynamesdef.py

Index: tools/telemetry/third_party/rope/rope/base/pynamesdef.py
diff --git a/tools/telemetry/third_party/rope/rope/base/pynamesdef.py b/tools/telemetry/third_party/rope/rope/base/pynamesdef.py
new file mode 100644
index 0000000000000000000000000000000000000000..6dba0a803762d9feb78644b048e2fc06a05c9e16
--- /dev/null
+++ b/tools/telemetry/third_party/rope/rope/base/pynamesdef.py
@@ -0,0 +1,55 @@
+import rope.base.oi.soi
+from rope.base import pynames
+from rope.base.pynames import *
+
+
+class AssignedName(pynames.AssignedName):
+
+    def __init__(self, lineno=None, module=None, pyobject=None):
+        self.lineno = lineno
+        self.module = module
+        self.assignments = []
+        self.pyobject = _Inferred(self._get_inferred,
+                                  pynames._get_concluded_data(module))
+        self.pyobject.set(pyobject)
+
+    @utils.prevent_recursion(lambda: None)
+    def _get_inferred(self):
+        if self.module is not None:
+            return rope.base.oi.soi.infer_assigned_object(self)
+
+    def get_object(self):
+        return self.pyobject.get()
+
+    def get_definition_location(self):
+        """Returns a (module, lineno) tuple"""
+        if self.lineno is None and self.assignments:
+            self.lineno = self.assignments[0].get_lineno()
+        return (self.module, self.lineno)
+
+    def invalidate(self):
+        """Forget the `PyObject` this `PyName` holds"""
+        self.pyobject.set(None)
+
+
+class ParameterName(pynames.ParameterName):
+
+    def __init__(self, pyfunction, index):
+        self.pyfunction = pyfunction
+        self.index = index
+
+    def get_object(self):
+        result = self.pyfunction.get_parameter(self.index)
+        if result is None:
+            result = rope.base.pyobjects.get_unknown()
+        return result
+
+    def get_objects(self):
+        """Returns the list of objects passed as this parameter"""
+        return rope.base.oi.soi.get_passed_objects(
+            self.pyfunction, self.index)
+
+    def get_definition_location(self):
+        return (self.pyfunction.get_module(), self.pyfunction.get_ast().lineno)
+
+_Inferred = pynames._Inferred