diff -r 6923074540dd -r dbc065a2f7a5 graphics/GraphicCommons.py
--- a/graphics/GraphicCommons.py	Thu Oct 04 11:25:42 2018 +0300
+++ b/graphics/GraphicCommons.py	Thu Oct 04 12:07:16 2018 +0300
@@ -26,6 +26,7 @@
 from __future__ import absolute_import
 from math import *
 from types import *
+from six.moves import xrange
 
 import wx
 from graphics.ToolTipProducer import ToolTipProducer