Print help when invoked with no arguments
diff --git a/scripts/config.py b/scripts/config.py
index ac2a298..c14d867 100755
--- a/scripts/config.py
+++ b/scripts/config.py
@@ -367,7 +367,10 @@
 
         args = parser.parse_args()
         config = ConfigFile(args.file)
-        if args.command == 'get':
+        if args.command is None:
+            parser.print_help()
+            return 1
+        elif args.command == 'get':
             if args.symbol in config:
                 value = config[args.symbol]
                 if value: