Update app.py

app.py

@@ -9,6 +9,7 @@ import torch
 import gradio as gr
 import uuid
 from sentence_transformers import SentenceTransformer
+import os
 
 # model_name = 'google/flan-t5-base'
 # model = T5ForConditionalGeneration.from_pretrained(model_name, device_map='auto', offload_folder="offload")