Tkinter, step 2: adapt imports.
diff --git a/Lib/idlelib/ToolTip.py b/Lib/idlelib/ToolTip.py
index ce7a3d3..b178803 100644
--- a/Lib/idlelib/ToolTip.py
+++ b/Lib/idlelib/ToolTip.py
@@ -3,7 +3,7 @@
 # may be useful for some purposes in (or almost in ;) the current project scope
 # Ideas gleaned from PySol
 
-from Tkinter import *
+from tkinter import *
 
 class ToolTipBase: