fix print test for python2.7

murrayrm · murrayrm · commit 47112b4ce18c · 2019-12-29T22:09:10.000-08:00
diff --git a/control/tests/iosys_test.py b/control/tests/iosys_test.py
@@ -8,6 +8,7 @@
 # operations on input/output systems.  Separate unit tests should be
 # created for that purpose.
 
+from __future__ import print_function
 import unittest
 import warnings
 import numpy as np
