--- a/editors/ResourceEditor.py	Fri Nov 23 11:01:20 2018 +0100
+++ b/editors/ResourceEditor.py	Fri Nov 23 12:13:24 2018 +0100
@@ -27,6 +27,7 @@
 import wx
 import wx.lib.buttons
 import wx.grid
+from six.moves import xrange
 
 from graphics.GraphicCommons import REFRESH_HIGHLIGHT_PERIOD, ERROR_HIGHLIGHT
 from controls import CustomGrid, CustomTable, DurationCellEditor