asyncio 简单demo

import asyncio

async def fetch_data(n):

    print(f"Task {n}: 开始获取数据")

    await asyncio.sleep(1)  # 模拟IO操作

    print(f"Task {n}: 数据获取完成")

    return f"数据{n}"

async def main():

    tasks = [fetch_data(i) for i in range(5)]

    results = await asyncio.gather(*tasks)

    print("所有任务完成，结果：", results)

if __name__ == "__main__":

    asyncio.run(main())