diff -r bcc07ff2362c -r d5df428640ff py_ext/PythonFileCTNMixin.py
--- a/py_ext/PythonFileCTNMixin.py	Thu Aug 17 14:27:06 2017 +0300
+++ b/py_ext/PythonFileCTNMixin.py	Thu Aug 17 15:43:25 2017 +0300
@@ -103,10 +103,10 @@
         varinfos = map(lambda variable: {
                     "name": variable.getname(),
                     "desc": repr(variable.getdesc()),
-                    "onchangecode": '"'+variable.getonchange() + \
-                                         "('"+variable.getname()+"')\"" \
+                    "onchangecode": '"' + variable.getonchange() +
+                                         "('" + variable.getname() + "')\""
                                      if variable.getonchange() else '""',
-                    "onchange": repr(variable.getonchange()) \
+                    "onchange": repr(variable.getonchange())
                                  if variable.getonchange() else None,
                     "opts": repr(variable.getopts()),
                     "configname": configname.upper(),