diff --git a/PaddleRL/DeepQNetwork/train.py b/PaddleRL/DeepQNetwork/train.py
index 04ee1ef143604aa16207d050da1af0f0c2a303a5..dd7986d704aec0c0948f81ca7ddd69bbbd3ea239 100644
--- a/PaddleRL/DeepQNetwork/train.py
+++ b/PaddleRL/DeepQNetwork/train.py
@@ -112,7 +112,7 @@ def train_agent():
         while len(exp) < MEMORY_WARMUP_SIZE:
             total_reward, step = run_train_episode(agent, env, exp)
             pbar.update(step)
-    
+
     # train
     test_flag = 0
     save_flag = 0