Update app.py

app.py

@@ -242,8 +242,12 @@ def add_message(history, message):
             args, model_path, tokenizer, model, image_processor, context_len
         )
 
-    for x in message["files"]:
-        history.append(((x,), None))
+    if len(message["files"]) <= 1:
+        for x in message["files"]:
+            history.append(((x,), None))
+    elif len(message["files"]) > 1:
+        history.append((tuple(message["files"]), None))
+        
     if message["text"] is not None:
         history.append((message["text"], None))