Update app.py

app.py

@@ -18,7 +18,7 @@ def chat_with_image(message, image, history):
     messages = [{"role": "system", "content": "You are a helpful assistant that can analyze images and text."}]
     
     for human, assistant in history:
-        if isinstance(human, tuple) and human[1] is not None:
+        if isinstance(human, list) and len(human) == 2 and human[1] is not None:
             # This is an image message
             encoded_image = encode_image(Image.open(human[1]))
             messages.append({
@@ -76,14 +76,17 @@ with gr.Blocks() as demo:
     clear = gr.Button("Clear")
 
     def user(user_message, image, history):
-        return "", None, history + [((user_message, image), None)]
+        if image is not None:
+            return "", None, history + [[user_message, image], None]
+        else:
+            return "", None, history + [[user_message, None], None]
 
     def bot(history):
-        user_message, image = history[-1][0]
-        bot_message = chat_with_image(user_message, image, history[:-1])
-        history[-1] = (history[-1][0], "")
+        user_message, user_image = history[-1][0]
+        bot_message = chat_with_image(user_message, user_image, history[:-1])
+        history[-1][1] = ""
         for character in bot_message:
-            history[-1] = (history[-1][0], history[-1][1] + character)
+            history[-1][1] += character
             yield history
 
     msg.submit(user, [msg, image, chatbot], [msg, image, chatbot], queue=False).then(