fix a lot of Tkinter imports
diff --git a/Demo/tkinter/guido/imagedraw.py b/Demo/tkinter/guido/imagedraw.py
index d3dba45..a168831 100755
--- a/Demo/tkinter/guido/imagedraw.py
+++ b/Demo/tkinter/guido/imagedraw.py
@@ -1,6 +1,6 @@
 """Draw on top of an image"""
 
-from Tkinter import *
+from tkinter import *
 import sys
 
 def main():