装饰器版协程

装饰器版协程

import threading
import asyncio

#①添加装饰器之后函数变为协程
@asyncio.coroutine
def hello():
    print('Hello world! (tid: %s)' % threading.currentThread().ident)
    yield from asyncio.sleep(3) # 模拟异步执行耗时任务。yield from从后面的可迭代对象中返回东西
    print('Hello again! (tid:%s)' % threading.currentThread().ident)
    yield from asyncio.sleep(2)
    print('Hello again2! (tid:%s)' % threading.currentThread().ident)


@asyncio.coroutine
def bye():
    print('bye (tid:%s)' % threading.currentThread().ident)
    yield from asyncio.sleep(1)
    print('bye again! (tid:%s)' % threading.currentThread().ident)
    yield from asyncio.sleep(1)
    print('bye again2! (tid:%s)' % threading.currentThread().ident)

 

#②下面这些与async异步模式协程一致。

loop = asyncio.get_event_loop()

tasks = [hello(), bye()]
loop.run_until_complete(asyncio.wait(tasks))
loop.close()