Tkinter, step 2: adapt imports.
diff --git a/Lib/tkinter/simpledialog.py b/Lib/tkinter/simpledialog.py
index fa2d1ad..36c6258 100644
--- a/Lib/tkinter/simpledialog.py
+++ b/Lib/tkinter/simpledialog.py
@@ -1,7 +1,7 @@
 """A simple but flexible modal dialog box."""
 
 
-from Tkinter import *
+from tkinter import *
 
 
 class SimpleDialog: