本文實例講述了Python實現多線程的兩種方式。分享給大家供大家參考，具體如下：

目前python 提供了幾種多線程實現方式 thread，threading，multithreading ,其中thread模塊比較底層，而threading模塊是對thread做了一些包裝，可以更加方便的被使用。

2.7版本之前python對線程的支持還不夠完善，不能利用多核CPU，但是2.7版本的python中已經考慮改進這點，出現了multithreading  模塊。threading模塊里面主要是對一些線程的操作對象化，創建Thread的class。一般來說，使用線程有兩種模式:

• A 創建線程要執行的函數，把這個函數傳遞進Thread對象里，讓它來執行；
• B 繼承Thread類，創建一個新的class，將要執行的代碼 寫到run函數里面。

本文介紹兩種實現方法。

第一種 創建函數并且傳入Thread 對象中

t.py 腳本內容

import threading,timefrom time import sleep, ctimedef now() : return str( time.strftime( '%Y-%m-%d %H:%M:%S' , time.localtime() ) )def test(nloop, nsec): print 'start loop', nloop, 'at:', now() sleep(nsec) print 'loop', nloop, 'done at:', now()def main(): print 'starting at:',now() threadpool=[] for i in xrange(10):  th = threading.Thread(target= test,args= (i,2))  threadpool.append(th) for th in threadpool:  th.start() for th in threadpool :  threading.Thread.join( th ) print 'all Done at:', now()if __name__ == '__main__':  main()

執行結果：

starting at: 2018-08-29 09:34:16
start loop 0 at: 2018-08-29 09:34:16
start loop 1 at: 2018-08-29 09:34:16
start loop 2 at: 2018-08-29 09:34:16start loop 3 at: 2018-08-29 09:34:16

start loop 4 start loopat:  52018-08-29 09:34:16 
at: 2018-08-29 09:34:16
start loop 6 at: start loop2018-08-29 09:34:16 
7 at: 2018-08-29 09:34:16
start loop 8 start loopat: 9  2018-08-29 09:34:16at:
 2018-08-29 09:34:16
looploop 1 done at: 2018-08-29 09:34:18
 0 done at: 2018-08-29 09:34:18
loop 3 done at: 2018-08-29 09:34:18
looploop 5 done at: 2018-08-29 09:34:18
 2 done at: 2018-08-29 09:34:18
loop 4 done at: 2018-08-29 09:34:18
looploop 7 done at: 2018-08-29 09:34:18
 6 done at: 2018-08-29 09:34:18
looploop  98  done at:done at:  2018-08-29 09:34:182018-08-29 09:34:18

all Done at: 2018-08-29 09:34:18

第二種 創建繼承自Thread的類

thclass.py 腳本內容：

import threading , timefrom time import sleep, ctimedef now() : return str(time.strftime('%Y-%m-%d %H:%M:%S' , time.localtime()))class myThread (threading.Thread) : """docstring for myThread""" def __init__(self, nloop, nsec) :  super(myThread, self).__init__()  self.nloop = nloop  self.nsec = nsec def run(self):  print 'start loop', self.nloop, 'at:', ctime()  sleep(self.nsec)  print 'loop', self.nloop, 'done at:', ctime()def main(): thpool = [] print 'starting at:', now() for i in xrange(10):  thpool.append(myThread(i, 2)) for th in thpool:  th.start() for th in thpool:  th.join() print 'all Done at:', now()if __name__ == '__main__':  main()

執行結果：

starting at: 2018-08-29 09:36:02
start loop 0 at: Wed Aug 29 09:36:02 2018
start loop 1 at: Wed Aug 29 09:36:02 2018
start loop 2 at: Wed Aug 29 09:36:02 2018
start loop 3 at: Wed Aug 29 09:36:02 2018
start loop 4 at: Wed Aug 29 09:36:02 2018
 start loop 5 at: Wed Aug 29 09:36:02 2018
start loop 6 at: Wed Aug 29 09:36:02 2018
start loop 7 at: Wed Aug 29 09:36:02 2018
start loop 8 at: Wed Aug 29 09:36:02 2018
start loop 9 at: Wed Aug 29 09:36:02 2018
loop 0 done at: Wed Aug 29 09:36:04 2018
loop 1 done at: Wed Aug 29 09:36:04 2018
looploop  23  done at:done at:  Wed Aug 29 09:36:04 2018Wed Aug 29 09:36:04 2018

loop 4 done at: Wed Aug 29 09:36:04 2018
loop 5 done at: Wed Aug 29 09:36:04 2018
loop 6 done at: Wed Aug 29 09:36:04 2018
looploop loop 8 9 7 done at: done at: done at: Wed Aug 29 09:36:04 2018 Wed Aug 29 09:36:04 2018
Wed Aug 29 09:36:04 2018

all Done at: 2018-08-29 09:36:04

希望本文所述對大家Python程序設計有所幫助。