The Canvas module has been deprecated for removal in 3.0.
diff --git a/Lib/lib-tk/Canvas.py b/Lib/lib-tk/Canvas.py
index 83d7bba..34464ab 100644
--- a/Lib/lib-tk/Canvas.py
+++ b/Lib/lib-tk/Canvas.py
@@ -3,6 +3,10 @@
 # NOTE: This module was an experiment and is now obsolete.
 # It's best to use the Tkinter.Canvas class directly.
 
+from warnings import warnpy3k
+warnpy3k("the Canvas module has been removed in Python 3.0", stacklevel=2)
+del warnpy3k
+
 from Tkinter import Canvas, _cnfmerge, _flatten