Update app.py

app.py

@@ -99,7 +99,10 @@ def run_inference(model, pil_image):
     for box in boxes:
         # ultralytics Box object fields depend on package version; defensive access:
         try:
-            xyxy = box.xyxy.cpu().numpy().tolist()
+           xyxy = box.xyxy.cpu().numpy().tolist()
+           if isinstance(xyxy[0], list):
+              xyxy = xyxy[0]
+
         except Exception:
             xyxy = getattr(box, "xyxy", None)
             if xyxy is None: