No try: needed for pop/importlib/getattr

scripts/uncloud

@@ -73,10 +73,14 @@ if __name__ == '__main__':
         arguments = vars(args)
         print(arguments)
         print(etcd_parser)
-        try:
+
         name = arguments.pop('command')
         mod = importlib.import_module('uncloud.{}.main'.format(name))
         main = getattr(mod, 'main')
+
+        if component in ETCD_COMPONENTS:
+            import etcd3
+        try:
             main(arguments)
         except UncloudException as err:
             logger.error(err)