diff -r c553769a65af -r b13f021c68a5 py_ext/PythonFileCTNMixin.py
--- a/py_ext/PythonFileCTNMixin.py	Tue Oct 09 13:50:29 2018 +0300
+++ b/py_ext/PythonFileCTNMixin.py	Tue Oct 09 14:03:44 2018 +0300
@@ -318,4 +318,4 @@
         return ([(Gen_PyCfile_path, matiec_CFLAGS)],
                 "",
                 True,
-                ("runtime_%s.py" % location_str, file(runtimefile_path, "rb")))
+                ("runtime_%s.py" % location_str, open(runtimefile_path, "rb")))