asyncio 异步协程

 1 import asyncio, time
 2 
 3 #异步协程
 4 async def hello():
 5     """
 6     这边程序运行时，线程不会等待这个sleep 1s,将直接终端继续执行往下执行，这边5个任务会并发执行
 7     :return:
 8     """
 9     print("hello world")
10     asyncio.sleep(1)
11     print("Hello again! time:{}".format(time.time()))
12 
13 def run():
14     for i in range(5):
15         loop.run_until_complete(hello())
16 
17 if __name__ == "__main__":
18     loop = asyncio.get_event_loop()
19     run()
20     loop.close()