This is either a turtle graphics or tkinter problem. 

In Python 3.4 it appears that something in Turtle Graphics broke or at least changed. I get the following error when trying to run a program that works in Python 3.1 and 3.2.

Kent's Mac> python3.4 c4.py
Traceback (most recent call last):
  File "c4.py", line 283, in <module>
    main()
  File "c4.py", line 277, in main
    animApp = Connect4Application(root)
  File "c4.py", line 110, in __init__
    self.buildWindow()
  File "c4.py", line 129, in buildWindow
    theTurtle = turtle.RawTurtle(canvas)
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/turtle.py", line 2534, in __init__
    self.screen = TurtleScreen(canvas)
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/turtle.py", line 1000, in __init__
    cv._rootwindow.call('wm', 'attributes', '.', '-topmost', '1')
AttributeError: 'Canvas' object has no attribute '_rootwindow'
Kent's Mac> 

The code is attached. The error occurs on line 129 when trying to create a RawTurtle and provide it with a Canvas.