异步编程是Python高性能开发的核心技能。

基础概念

import asyncio

async def fetch(url):
    await asyncio.sleep(1)
    return f"data from {url}"

async def main():
    results = await asyncio.gather(
        fetch("url1"), fetch("url2"), fetch("url3"))
    print(results)

asyncio.run(main())

aiohttp实战

import aiohttp

async def fetch(session, url):
    async with session.get(url) as resp:
        return await resp.text()

async def main():
    async with aiohttp.ClientSession() as s:
        html = await fetch(s, "https://example.com")

参考：Python官方文档 | 2026年06月17日