support for ancient Python versions (2.7.x)
diff --git a/example/example3.py b/example/example3.py
index a889320..41cf314 100755
--- a/example/example3.py
+++ b/example/example3.py
@@ -1,4 +1,5 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
+from __future__ import print_function
 import sys
 sys.path.append('.')