{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# 运行 I/O 密集型任务\n",
    "\n",
    "NiceGUI 提供了一个 `io_bound` 函数，用于在单独的线程中运行 I/O 密集型任务。对于那些长时间运行的 I/O 操作而言，这非常有用，否则这些操作会阻塞事件循环并使 UI 无响应。该函数返回一个可以被等待的 future。"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<nicegui.elements.button.Button at 0x190f2e91590>"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "import requests\n",
    "from nicegui import run, ui\n",
    "\n",
    "async def handle_click():\n",
    "    URL = 'https://httpbin.org/delay/1'\n",
    "    response = await run.io_bound(requests.get, URL, timeout=3)\n",
    "    ui.notify(f'Downloaded {len(response.content)} bytes')\n",
    "\n",
    "ui.button('Download', on_click=handle_click)\n",
    "\n",
    "# ui.run()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "py311",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.11.7"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}