fix

app.py

@@ -3,6 +3,7 @@ from pydantic import BaseModel
 import numpy as np
 import pickle
 from huggingface_hub import hf_hub_download
+from typing import List, Optional
 
 app = FastAPI()
 
@@ -13,9 +14,9 @@ with open(model_path, "rb") as f:
     model = pickle.load(f)
 
 class InputData(BaseModel):
-    X: list
-    T0: list | None = None
-    T1: list | None = None
+    X: List
+    T0: Optional[List] = None
+    T1: Optional[List] = None
 
 @app.post("/model-effect")
 def predict(data: InputData):