diff -Nru dtopt-0.1/dtopt/tests.py.orig dtopt-0.1/dtopt/tests.py
--- dtopt-0.1/dtopt/tests.py.orig	2007-08-10 20:24:37.000000000 +0200
+++ dtopt-0.1/dtopt/tests.py	2016-02-02 09:05:24.151764835 +0100
@@ -19,6 +19,6 @@
 if __name__ == '__main__':
     import doctest
     doctest.testmod()
-    print 'Expect *one* error.  Zero is bad, two is bad.'
-    print 'One error is good'
+    print('Expect *one* error.  Zero is bad, two is bad.')
+    print('One error is good')