Update README.md

README.md

@@ -19,6 +19,7 @@ model-index:
       value: 240.43 +/- 20.04
       name: mean_reward
       verified: false
+license: mit
 ---
 
 # **PPO** Agent playing **LunarLander-v2**
@@ -26,12 +27,22 @@ This is a trained model of a **PPO** agent playing **LunarLander-v2**
 using the [stable-baselines3 library](https://github.com/DLR-RM/stable-baselines3).
 
 ## Usage (with Stable-baselines3)
-TODO: Add your code
-
-
 ```python
-from stable_baselines3 import ...
 from huggingface_sb3 import load_from_hub
+repo_id = "zhiweiyoung/ppo-LunarLander-v2" # The repo_id
+filename = "zhiwei_ppo.zip" # The model filename.zip
+
+# When the model was trained on Python 3.8 the pickle protocol is 5
+# But Python 3.6, 3.7 use protocol 4
+# In order to get compatibility we need to:
+# 1. Install pickle5 (we done it at the beginning of the colab)
+# 2. Create a custom empty object we pass as parameter to PPO.load()
+custom_objects = {
+            "learning_rate": 0.0,
+            "lr_schedule": lambda _: 0.0,
+            "clip_range": lambda _: 0.0,
+}
 
-...
+checkpoint = load_from_hub(repo_id, filename)
+model = PPO.load(checkpoint, custom_objects=custom_objects, print_system_info=True)
 ```