Update app.py

app.py

@@ -385,8 +385,9 @@ def gradio_reset(chat_state, img_list, path_list):
         chat_state.messages = []
     if img_list is not None:
         img_list = []
-    for path in path_list:
-        os.remove(path)
+    if isinstance(path_list, list):
+        for path in path_list:
+            os.remove(path)
     return None, gr.update(value=None, interactive=True), gr.update(placeholder='Upload your image and chat',
                                                                     interactive=True), chat_state, img_list
 
@@ -486,7 +487,8 @@ def gradio_stream_answer(chatbot, chat_state, img_list, temperature):
 def gradio_visualize(chatbot, gr_img, path_list):
     if isinstance(gr_img, dict):
         gr_img, mask = gr_img['image'], gr_img['mask']
-
+    if not isinstance(path_list, list):
+        path_list = []
     unescaped = reverse_escape(chatbot[-1][1])
     visual_img, generation_color = visualize_all_bbox_together(gr_img, unescaped)
     if visual_img is not None: