diff --git a/example/reinforcement-learning/ddpg/strategies.py b/example/reinforcement-learning/ddpg/strategies.py
index d73ad060cc87..eb22ddf59728 100644
--- a/example/reinforcement-learning/ddpg/strategies.py
+++ b/example/reinforcement-learning/ddpg/strategies.py
@@ -61,7 +61,7 @@ def reset(self):
     def get_action(self, obs, policy):
 
         # get_action accepts a 2D tensor with one row
-    	obs = obs.reshape((1, -1))
+        obs = obs.reshape((1, -1))
         action = policy.get_action(obs)
         increment = self.evolve_state()
 
@@ -94,5 +94,3 @@ def __init__(self):
 
     plt.plot(states)
     plt.show()
-
-