Tkinter rename, step 2: fix imports and add stub modules.
diff --git a/Lib/idlelib/SearchDialogBase.py b/Lib/idlelib/SearchDialogBase.py
index f63e7ae..65914ac 100644
--- a/Lib/idlelib/SearchDialogBase.py
+++ b/Lib/idlelib/SearchDialogBase.py
@@ -1,4 +1,4 @@
-from Tkinter import *
+from tkinter import *
 
 class SearchDialogBase: