--- a/editors/TextViewer.py	Fri Oct 12 11:50:40 2018 +0300
+++ b/editors/TextViewer.py	Fri Oct 12 12:06:45 2018 +0300
@@ -26,6 +26,7 @@
 from __future__ import absolute_import
 from __future__ import division
 import re
+from functools import reduce
 
 import wx
 import wx.stc