import asyncio

def callback(loop, i):

    print("success time {} {}".format(i, loop.time()))

async def get_html(url):

    print("start get url")

    await asyncio.sleep(1)

    print("end get url")

# 两种创建的方法

if __name__ == "__main__":

    loop = asyncio.get_event_loop()

    # get_future = asyncio.ensure_future(get_html("http://www.imooc.com"))

    task = loop.create_task(get_html("http://www.imooc.com"))

    loop.run_until_complete(task) # 接收的是一个future对象