Python中使用线程有两种方式：

1.函数式方式
2.类包装线程对象方式。

下面使用函数式方式，调用thread模块中的start_new_thread()函数来产生新线程。

语法格式如下:

thread.start_new_thread ( function, args[, kwargs] )

代码示例如下:

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#!/usr/bin/python

import thread
import time

#为线程定义一个函数

def  showTime(threadName,delayTime):
  countTime = 0

  while countTime < 5:
      time.sleep(delayTime)
      countTime += 1
      print "%s : %s" % (threadName, time.ctime(time.time()) )



#创建线程
try:
  thread.start_new_thread (showTime, ("ksnow thread", 2 ) )
  thread.start_new_thread (showTime, ("kair thread", 3 ) )
  thread.start_new_thread (showTime, ("baby thread", 5 ) )


except:
  print "Error: unable to start thread"

while 1:
   pass

运行结果如下：

ksnowlv@ksnowlvdeMacBook-Pro~/Documents/lvwei projects/python$python thread_start_new_thread.py 
ksnow thread : Thu Aug  7 21:11:33 2014
kair thread : Thu Aug  7 21:11:34 2014
ksnow thread : Thu Aug  7 21:11:35 2014
baby thread : Thu Aug  7 21:11:36 2014
kair thread : Thu Aug  7 21:11:37 2014
ksnow thread : Thu Aug  7 21:11:37 2014
ksnow thread : Thu Aug  7 21:11:39 2014
kair thread : Thu Aug  7 21:11:40 2014
baby thread : Thu Aug  7 21:11:41 2014
ksnow thread : Thu Aug  7 21:11:41 2014
kair thread : Thu Aug  7 21:11:43 2014
baby thread : Thu Aug  7 21:11:46 2014
kair thread : Thu Aug  7 21:11:46 2014
baby thread : Thu Aug  7 21:11:51 2014
baby thread : Thu Aug  7 21:11:56 2014

注意事项

1.线程的结束一般依靠线程函数的自然结束；
2.可以在线程函数中调用thread.exit()，
抛出SystemExit exception，达到退出线程的目的。