Print error message

diff --git a/scripts/mysql-to-sql.py b/scripts/mysql-to-sql.py
index add0a8cad3e8a0a1d7e63568ee16a01d8cfce1ea..be137a849be27ce42bc4fc96db5c6679c42c2c14 100755 (executable)
--- a/scripts/mysql-to-sql.py
+++ b/scripts/mysql-to-sql.py
@@ -1,4 +1,5 @@
 #! /usr/bin/env python
+from __future__ import print_function
 
 import argparse
 import sys
@@ -32,6 +33,7 @@ if __name__ == '__main__':
     else:
         infile = sys.stdin
         if infile.isatty():
+            print("Error: cannot input from console", file=sys.stderr)
             parser.print_help()
             sys.exit()