diff --git a/robomaster_pi/conn_vel.py b/robomaster_pi/conn_vel.py
index f911922dfa415cfddc128ae7d8ab2ecee051015b..00509d3dc51b155ab772687b1b102cfe01935f7a 100644
--- a/robomaster_pi/conn_vel.py
+++ b/robomaster_pi/conn_vel.py
@@ -19,6 +19,7 @@ import ping3
 
 
     
+    
 class vel_from_ros_node(Node):
     def __init__(self, my_ep_chassis):