Python的async/await语法让异步编程变得简单直观。本文从协程基础讲起，逐步深入到事件循环、任务调度、并发控制等核心概念。\n\n\n\n\n\n## 为什么需要异步编程\n\n传统的同步编程在处理I/O密集型任务时效率低下。异步编程允许程序在等待I/O时执行其他任务，大幅提升并发性能。\n\n## async/await基础\n\npython\nimport asyncio\nasync def fetch_data(url):\n async with aiohttp.ClientSession() as session:\n async with session.get(url) as resp:\n return await resp.text()\n
