--- a/svgui/pyjs/pyjs.py	Wed Oct 10 10:32:57 2018 +0300
+++ b/svgui/pyjs/pyjs.py	Wed Oct 10 10:36:07 2018 +0300
@@ -23,6 +23,7 @@
 import os
 import copy
 from builtins import str as text
+from past.builtins import basestring
 from six.moves import cStringIO
 
 # the standard location for builtins (e.g. pyjslib) can be