Python---协程---重写多线程

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、

Python---协程---重写多线程

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