Update app.py

app.py

@@ -22,26 +22,28 @@ custom_css = """
 @spaces.GPU
 def chat_stream(message, history, model, system_prompt, temperature, max_tokens):
     """
-    Handles streaming responses using the modern list-of-dicts (messages) history format.
+    Handles streaming responses using the standard tuple-based chat history format.
+    history layout: [[user_msg1, bot_msg1], [user_msg2, bot_msg2], ...]
     """
     if not message.strip():
         yield history
         return
 
-    # 1. Initialize message list with system prompt for the Groq API payload
+    # 1. Initialize message list with system prompt for Groq API
     api_messages = [{"role": "system", "content": system_prompt}]
 
-    # 2. Append existing conversation history safely
-    for turn in history:
-        # turn is a dictionary: {"role": "user"|"assistant", "content": "..."}
-        api_messages.append({"role": turn["role"], "content": turn["content"]})
+    # 2. Append existing conversation history seamlessly 
+    for user_msg, bot_msg in history:
+        if user_msg:
+            api_messages.append({"role": "user", "content": user_msg})
+        if bot_msg:
+            api_messages.append({"role": "assistant", "content": bot_msg})
 
     # 3. Append the newest user message to the API list
     api_messages.append({"role": "user", "content": message})
     
-    # 4. Update the Gradio UI history using the dictionary format
-    history.append({"role": "user", "content": message})
-    history.append({"role": "assistant", "content": ""})
+    # 4. Update the Gradio UI history with an empty slot for the bot's upcoming message
+    history.append([message, ""])
     yield history
 
     # 5. Stream from Groq
@@ -58,12 +60,12 @@ def chat_stream(message, history, model, system_prompt, temperature, max_tokens)
         for chunk in stream:
             if chunk.choices[0].delta.content:
                 partial_response += chunk.choices[0].delta.content
-                # Update the very last item in history (the assistant's content dictionary)
-                history[-1]["content"] = partial_response
+                # Update the very last bot message slot in history
+                history[-1][1] = partial_response
                 yield history
 
     except Exception as e:
-        history[-1]["content"] = f"⚠️ Error connecting to Groq: {str(e)}"
+        history[-1][1] = f"⚠️ Error connecting to Groq: {str(e)}"
         yield history
 
 # Build the layout manually
@@ -107,8 +109,8 @@ with gr.Blocks() as demo:
 
         # --- RIGHT COLUMN: CHAT INTERFACE ---
         with gr.Column(scale=3):
-            # Explicitly state we are using the modern messages type for the component layout
-            chatbot = gr.Chatbot(elem_classes="chat-window", type="messages")
+            # Removed the `type="messages"` keyword argument entirely to prevent the TypeError
+            chatbot = gr.Chatbot(elem_classes="chat-window")
 
             msg_input = gr.Textbox(
                 placeholder="Type your message here and press Enter...",