If no option is given we will display help

dataLoad.py

@@ -23,9 +23,10 @@ parser.add_argument("JSON", type=str, nargs="?", help="Filename to save results"
 args = parser.parse_args()
 # pprint(args)
 
-# Or perhaps have parser.print_help()
+# If no option, display help and exit
 if ( not args.download and not args.train and not args.quick and not args.update ):
-    parser.error("Need --download, --train, --quick, or --update")
+    parser.print_help()
+    sys.exit()
 
 # httpbin.org/headers
 sess = requests.Session()