Update app.py

app.py

@@ -99,8 +99,9 @@ def export_predictions():
     global df_predict_results
     if df_predict_results is None:
         return None
-    # Save to Excel in-memory and send as downloadable file
-    return df_predict_results
+    export_path = "/mnt/data/predictions_output.xlsx"  # Gradio environment allows writing here
+    df_predict_results.to_excel(export_path, index=False)
+    return export_path
 
 with gr.Blocks() as demo:
     gr.Markdown("# 🧠 Text Classification App")