03 创建线程包装成协程

import asyncio
import time


def fn1(element: int):
    print("线程执行到这里了")
    print("IO开始")
    time.sleep(3)
    print("IO结束了")
    return 33 + element


async def main():
    # python3.6
    loop = asyncio.get_event_loop()
    # python3.7
    # loop = asyncio.get_running_loop()

    # 默认用线程池，如果想用多进程，创建进程池后传给第一个参数
    future = loop.run_in_executor(None, fn1, 5)

    # 在这期间可以干点别的事情
    print("干点别的事情")
    await asyncio.sleep(5)

    result = await future

    print(result)


# python3.6
asyncio.get_event_loop().run_until_complete(main())

# python3.7
# asyncio.run(main())