Tkinter, step 2: adapt imports.
diff --git a/Lib/idlelib/ScriptBinding.py b/Lib/idlelib/ScriptBinding.py
index 226c66c..1e98f1e 100644
--- a/Lib/idlelib/ScriptBinding.py
+++ b/Lib/idlelib/ScriptBinding.py
@@ -22,7 +22,7 @@
 import string
 import tabnanny
 import tokenize
-import tkMessageBox
+import tkinter.messagebox as tkMessageBox
 from idlelib.EditorWindow import EditorWindow
 from idlelib import PyShell