Tkinter rename, step 2: fix imports and add stub modules.
diff --git a/Lib/idlelib/run.py b/Lib/idlelib/run.py
index 8abbe50..18ddca7 100644
--- a/Lib/idlelib/run.py
+++ b/Lib/idlelib/run.py
@@ -127,9 +127,9 @@
     server.handle_request() # A single request only
 
 def show_socket_error(err, address):
-    import Tkinter
-    import tkMessageBox
-    root = Tkinter.Tk()
+    import tkinter
+    import tkinter.messagebox as tkMessageBox
+    root = tkinter.Tk()
     root.withdraw()
     if err[0] == 61: # connection refused
         msg = "IDLE's subprocess can't connect to %s:%d.  This may be due "\