# HG changeset patch
# Parent 8dea55fb20e99d1d76328701af175c431b2c3d70
Issue #22168: Prevent turtle AttributeError with non-default Canvas on OS X.

diff -r 8dea55fb20e9 Lib/turtle.py
--- a/Lib/turtle.py	Sat Aug 23 18:29:02 2014 -0400
+++ b/Lib/turtle.py	Sat Aug 23 17:35:04 2014 -0700
@@ -997,8 +997,9 @@
             # Force Turtle window to the front on OS X. This is needed because
             # the Turtle window will show behind the Terminal window when you
             # start the demo from the command line.
-            cv._rootwindow.call('wm', 'attributes', '.', '-topmost', '1')
-            cv._rootwindow.call('wm', 'attributes', '.', '-topmost', '0')
+            rootwindow = cv.winfo_toplevel()
+            rootwindow.call('wm', 'attributes', '.', '-topmost', '1')
+            rootwindow.call('wm', 'attributes', '.', '-topmost', '0')
 
     def clear(self):
         """Delete all drawings and all turtles from the TurtleScreen.