Ran 2to3 over scripts directory.
diff --git a/Tools/scripts/fixdiv.py b/Tools/scripts/fixdiv.py
index a4b4f21..8b15cc6 100755
--- a/Tools/scripts/fixdiv.py
+++ b/Tools/scripts/fixdiv.py
@@ -158,7 +158,7 @@
     warnings = readwarnings(args[0])
     if warnings is None:
         return 1
-    files = warnings.keys()
+    files = list(warnings.keys())
     if not files:
         print("No classic division warnings read from", args[0])
         return