Python 异步 IO

测试代码：

import asyncio
from time import sleep

def task():
    sleep(5)

async def async_task():
    await asyncio.to_thread(task)

def obj():
    asyncio.run(async_task())

async def async_obj():
    await asyncio.to_thread(obj)

def main():
    asyncio.run(async_obj())

if __name__ == "__main__":
    main()