make unittest2 error show up in stderr

original-commit-id: 914470651080df7cf0bf36e3fa45ed299dd694ec

1 files changed, 1 insertions, 1 deletions

diff --git a/crystal.py b/crystal.py
index 820e4c2..6f6ba09 100644
--- a/crystal.py
+++ b/crystal.py
@@ -21,7 +21,7 @@ import string
 
 # Check for things we need in unittest.
 if not hasattr(unittest.TestCase, 'setUpClass'):
-    print "The unittest2 module or Python 2.7 is required to run this script."
+    sys.stderr.write("The unittest2 module or Python 2.7 is required to run this script.")
     sys.exit(1)
 
 if not hasattr(json, "dumps"):