Updated manage_translations script

scripts/manage_translations.py

@@ -168,14 +168,11 @@ if __name__ == "__main__":
     RUNABLE_SCRIPTS = ('update_catalogs', 'lang_stats', 'fetch')
 
     parser = ArgumentParser()
-    parser.add_argument('cmd', nargs=1)
+    parser.add_argument('cmd', nargs=1, choices=RUNABLE_SCRIPTS)
     parser.add_argument("-r", "--resources", action='append',
         help="limit operation to the specified resources")
     parser.add_argument("-l", "--languages", action='append',
         help="limit operation to the specified languages")
     options = parser.parse_args()
 
-    if options.cmd[0] in RUNABLE_SCRIPTS:
-        eval(options.cmd[0])(options.resources, options.languages)
-    else:
-        print("Available commands are: %s" % ", ".join(RUNABLE_SCRIPTS))
+    eval(options.cmd[0])(options.resources, options.languages)