app.py

import gradio as gr

history = []

def chat(message, history):
    history.append(("user", message))
    bot_message = f"You said: {message}"
    history.append(("bot", bot_message))
    return history, history

with gr.Blocks() as demo:
    chatbot = gr.Chatbot(label="Chat")
    msg = gr.Textbox(label="Message", placeholder="Type here...", lines=1)
    clear = gr.Button("Clear")

    def respond(message, history):
        history.append((message, f"You said: {message}"))
        return "", history

    msg.submit(respond, [msg, chatbot], [msg, chatbot])
    clear.click(lambda: None, None, chatbot, queue=False)

demo.launch()