asyncio实现python异步io

简单实现并发执行

import asyncio
async def hello():
    print("Hello world1111!")
    #模拟io操作
    r = await asyncio.sleep(1)
    #r = await asyncio.sleep()
    print("11111111111111111")

async def hello_test():
    print("Hello world2222!")
    r = await asyncio.sleep(2)
    print("22222222222222")
  
#获取EventLoop:
loop = asyncio.get_event_loop()
#执行coroutine
task=[hello(),hello_test()]
tasks = asyncio.wait(task)
loop.run_until_complete(tasks)
loop.close()