全文转发
http://www.cnblogs.com/fnng/p/3670789.html
多线程和多进程是什么自行google补脑
对于python 多线程的理解，我花了很长时间，搜索的大部份文章都不够通俗易懂。所以，这里力图用简单的例子，让你对多线程有个初步的认识。
单线程
在好些年前的MS-DOS时代，操作系统处理问题都是单任务的，我想做听音乐和看电影两件事儿，那么一定要先排一下顺序。
（好吧！我们不纠结在DOS时代是否有听音乐和看影的应用。^_^）
from time import ctime,sleep
def music():
for i in range(2):
print "I was listening to music. %s" %ctime()
sleep(1)
def move():
for i in range(2):
print "I was at the movies! %s" %ctime()
sleep(5)
if __name__ == '__main__':
music()
move()
print "all over %s" %ctime()
我们先听了一首音乐，通过for循环来控制音乐的播放了两次，每首音乐播放需要1秒钟，sleep()来控制音乐播放的时长。接着我们又看了一场电影，
每一场电影需要5秒钟，因为太好看了，所以我也通过for循环看两遍。在整个休闲娱乐活动结束后，我通过
print "all over %s" %ctime()
看了一下当前时间，差不多该睡觉了。
运行结果：
>>=========================== RESTART ================================ >>> I was listening to music. Thu Apr 17 10:47:08 2014 I was listening to music. Thu Apr 17 10:47:09 2014 I was at the movies! Thu Apr 17 10:47:10 2014 I was at the movies! Thu Apr 17 10:47:15 2014 all over Thu Apr 17 10:47:20 2014
其实，music()和move()更应该被看作是音乐和视频播放器，至于要播放什么歌曲和视频应该由我们使用时决定。所以，我们对上面代码做了改造：
#coding=utf-8
import threading
from time import ctime,sleep
def music(func):
for i in range(2):
print "I was listening to %s. %s" %(func,ctime())
sleep(1)
def move(func):
for i in range(2):
print "I was at the %s! %s" %(func,ctime())
sleep(5)
if __name__ == '__main__':
music(u'爱情买卖')
move(u'阿凡达')
print "all over %s" %ctime()
对music()和move()进行了传参处理。体验中国经典歌曲和欧美大片文化。
运行结果：
>>> ======================== RESTART ================================ >>> I was listening to 爱情买卖. Thu Apr 17 11:48:59 2014 I was listening to 爱情买卖. Thu Apr 17 11:49:00 2014 I was at the 阿凡达! Thu Apr 17 11:49:01 2014 I was at the 阿凡达! Thu Apr 17 11:49:06 2014 all over Thu Apr 17 11:49:11 2014