Tkinter, step 2: adapt imports.
diff --git a/Lib/idlelib/tabbedpages.py b/Lib/idlelib/tabbedpages.py
index f8d89a4..f791702 100644
--- a/Lib/idlelib/tabbedpages.py
+++ b/Lib/idlelib/tabbedpages.py
@@ -7,7 +7,7 @@
 TabSet -- A widget containing tabs (buttons) in one or more rows.
 
 """
-from Tkinter import *
+from tkinter import *
 
 class InvalidNameError(Exception): pass
 class AlreadyExistsError(Exception): pass