如何利用niceGUI构建一个流式单轮对话界面

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import asyncio
import time
import requests
from fastapi import FastAPI
from nicegui import app, uiclass ChatPage:temperature: ui.slider = Nonetop_p: ui.slider = Noneapi_key: ui.input = Nonemodel_name: ui.input = Noneprompt: ui.textarea = Nonesend: ui.button = Nonespinner: ui.spinner = Nonechat_messages: ui.markdown = Nonedef __init__(self, api_key="", model_name=""):self.left_page(api_key=api_key, model_name=model_name)self.chat_page()def left_page(self, api_key="", model_name=""):with ui.left_drawer(top_corner=True, bottom_corner=True).style('background-color: #d7e3f4;margin: auto'):self.api_key = ui.input(label='api 密钥', placeholder='请输入', value=api_key).props('filled')self.model_name = ui.input(label='模型名称', placeholder='请输入', value=model_name).props('filled')if api_key:self.api_key.disable()if model_name:self.model_name.disable()with ui.label("Temperature") as Temperature:self.temperature = ui.slider(min=0, max=1, value=0.7, step=0.01,on_change=lambda e: Temperature.set_text(f"Temperature: {e.value}"))with ui.label("Top_p") as Top_p:self.top_p = ui.slider(min=0, max=1, value=0.75, step=0.01,on_change=lambda e: Top_p.set_text(f"Top_p: {e.value}"))self.prompt = ui.textarea(label='Prompt', placeholder='请输入你的问题').props('filled')self.send = ui.button(icon="reply", text="发送", on_click=self.on_send).style("width: 100%;")def chat_page(self):self.chat_messages = ui.markdown()async def set_chat(self):content_ = ""for i in self.prompt.value:content_ += iawait asyncio.sleep(0.03)self.chat_messages.set_content(content_ + "```")self.chat_messages.set_content(content_ + "```")self.chat_messages.set_content(content_)await ui.run_javascript('window.scrollTo(0, document.body.scrollHeight)', respond=False)async def on_send(self, e):self.send.visible = Falseself.spinner = ui.spinner(size="lg")await self.set_chat()self.spinner.set_visibility(False)self.send.visible = True@ui.page('/')
def page(api_key="", model_name=""):ui.colors(primary="#1d1d1d")ChatPage(api_key=api_key, model_name=model_name)def frontend(app_: FastAPI) -> None:ui.run_with(app_,storage_secret='pick your private secret here',# NOTE setting a secret is optional but allows for persistent storage per user)