一、
# 用协程的方式，修改播放电影和音乐的练习题
# 用协程的方式完成播放 movie_list = ["斗破.mp4", "复仇者联盟.avi", "钢铁雨.rmvb", "xxx.mp4"] music_list = ["周杰伦.mp3", "五月天.mp3"] movie_format = ['mp4', 'avi'] music_format = ['mp3'] import time import asyncio #async await @asyncio.coroutine def play(playlist): for i in playlist: if i.split(".")[1] in movie_format: print("now playing movie named {}".format(i)) yield time.sleep(1) elif i.split(".")[1] in music_format: print("now playing music named {}".format(i)) yield time.sleep(2) else: print("NO SUPPORTED") loop = asyncio.get_event_loop() task = [play(movie_list), play(music_list)] loop.run_until_complete(asyncio.wait(task)) loop.close() 二、 # 用协程的方式完成播放 movie_list = ["斗破.mp4", "复仇者联盟.avi", "钢铁雨.rmvb", "xxx.mp4"] music_list = ["周杰伦.mp3", "五月天.mp3"] movie_format = ['mp4', 'avi'] music_format = ['mp3'] import time import asyncio #async await #@asyncio.coroutine async def play(playlist): for i in playlist: if i.split(".")[1] in movie_format: print("now playing movie named {}".format(i)) await asyncio.sleep(1) elif i.split(".")[1] in music_format: print("now playing music named {}".format(i)) await asyncio.sleep(2) else: print("NO SUPPORTED") loop = asyncio.get_event_loop() task = [play(movie_list), play(music_list)] loop.run_until_complete(asyncio.wait(task)) loop.close() 三、#### 使用协程的概念，达到以下目的，输入a、b、c、d四个整数，打印出(a+b)*(c+d)的值，假设a+b和c+d是一个耗时一秒的IO操作 # encoding:utf-8 # 使用协程的概念，达到以下目的，输入a、b、c、d四个整数，打印出(a+b)*(c+d)的值，假设a+b和c+d是一个耗时一秒的IO操作 import asyncio import threading async def sum(a, b): print("now begin cacl, current thread is {}".format(threading.currentThread())) r = int(a) + int(b) await asyncio.sleep(1) print("现在计算完了，current thread is {}".format(threading.currentThread())) return r loop = asyncio.get_event_loop() task = asyncio.gather(sum(1,2), sum(3,4)) loop.run_until_complete(task) r1,r2 = task.result() print(int(r1)*int(r2)) loop.close() 四、