Update README.md

README.md

@@ -30,8 +30,12 @@ TODO: Add your code
 
 
 ```python
-from stable_baselines3 import ...
+import gymnasium as gym
 from huggingface_sb3 import load_from_hub
+from stable_baselines3 import PPO
+from stable_baselines3.common.monitor import Monitor
+from stable_baselines3.common.evaluation import evaluate_policy
+
 
 repo_id = "ChihoonLee3/ppomlppolicy-LunarLander-v2"  # The repo_id
 filename = "ppo-LunarLander-v2.zip"  # The model filename.zip
@@ -39,4 +43,9 @@ filename = "ppo-LunarLander-v2.zip"  # The model filename.zip
 # Load the PPO model
 checkpoint = load_from_hub(repo_id, filename)
 model = PPO.load(checkpoint, print_system_info=True)
+
+# Evaluate the model in LunarLander-v2 environment
+eval_env = Monitor(gym.make("LunarLander-v2"))
+mean_reward, std_reward = evaluate_policy(model, eval_env, n_eval_episodes=10, deterministic=True)
+print(f"mean_reward={mean_reward:.2f} +/- {std_reward}")
 ```