@async注解使用代码

在Python中，@asyncio.coroutine和@asyncio.coroutine装饰器已经被弃用，使用@async和async def代替。下面是一个使用@async装饰器的示例代码：

import asyncio

@asyncio.coroutine
def coroutine_func():
    yield from asyncio.sleep(1)
    print("Coroutine function completed")

@asyncio.coroutine
def main():
    print("Starting coroutine function")
    yield from coroutine_func()
    print("Coroutine function finished")

loop = asyncio.get_event_loop()
loop.run_until_complete(main())

使用@async装饰器的示例代码：

import asyncio

async def coroutine_func():
    await asyncio.sleep(1)
    print("Coroutine function completed")

async def main():
    print("Starting coroutine function")
    await coroutine_func()
    print("Coroutine function finished")

loop = asyncio.get_event_loop()
loop.run_until_complete(main())