Update app.py

app.py

@@ -20,8 +20,8 @@ with open("dat.json", "r", encoding="utf-8") as f:
 CLASSES = list(data)  # ordered list of class names [1]
 
 def empty_df():
-    # Provide a fresh DataFrame for BarPlot resets (component expects a DataFrame) [3]
-    return pd.DataFrame({"item": CLASSES, "probability":  * len(CLASSES)})  # [3]
+    # FIX: build zeros list via  * len(CLASSES) instead of a starred expression in dict value [1]
+    return pd.DataFrame({"item": CLASSES, "probability": [0] * len(CLASSES)})  # [3]
 
 # ----------------------------
 # Utils