app.py

import gradio as gr

with gr.Blocks() as demo:
    with gr.Box():
      chat = gr.Chatbot(label="Chat")
      with gr.Row():
          msg_box = gr.Textbox(show_label=False, placeholder="Type a message.", scale=5, container=False)
          submit_btn = gr.Button("Send", scale=1, variant='primary')
  
if __name__ == "__main__":
    demo.launch()