python进阶笔记 thread 和 threading模块学习

Python通过两个标准库thread和threading提供对线程的支持。
thread提供了低级别的、原始的线程以及一个简单的锁。
threading基于Java的线程模型设计。
锁（Lock）和条件变量（Condition）在Java中是对象的基本行为（每一个对象都自带了锁和条件变量），而在Python中则是独立的对象。
start_new_thread()要求一定要有前两个参数。所以，就算我们想要运行的函数不要参数，我们也要传一个空的元组。

test_thread.py

#! /usr/bin/env python
# -*- coding:utf-8 -*-
import thread
import time
from time import sleep,ctime

test_list = [5,8]
def f1():
    print 'start f1 at:',ctime()
    sleep(5)
    print 'f1 done at:',ctime()
def f2():
    print 'start f1 at:',ctime()
    sleep(3)
    print 'f1 done at:',ctime()
def main():
    print "start:",ctime()
    thread.start_new_thread(f1,())
    thread.start_new_thread(f2,())
    sleep(6)
    print "all end:",ctime()
if __name__ == '__main__':
    main()

test_threading.py

#! /usr/bin/env python
# -*- coding:utf-8 -*-
import threading
import time

exitFlag = 0

class myThread(threading.Thread):
    def __init__(self,threadID,name,delay):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.delay = delay
    def run(self):
        print "Starting" + self.name
        print_time(self.name,self.delay,5)
        print "Exiting" + self.name
def print_time(threadName,delay,counter):
    while counter:
        try:
            if exitFlag:
                thread.exit()
            time.sleep(delay)
            print "%s:%s" % (threadName, time.ctime(time.time()))
            counter -= 1
        except Exception,e:
            logging.info(e)
thread1 = myThread(1,"Thread-1",1)
thread2 = myThread(2,"Thread-2",2)

thread1.start()
thread2.start()

print "Exiting Main Thread"

python多线程threading.Lock锁的用法

#创建锁
mutex = threading.Lock()
#锁定
mutex.acquire([timeout])
#释放
mutex.release()

test_threading_lock.py

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import threading
import time

class my_thread(threading.Thread):
    def run(self):
        global num
        time.sleep(1)
        if mutex.acquire(1):
            num = num + 1
            msg =self.name + 'set num to '+str(num)
            print msg
            mutex.release()
num = 0
mutex = threading.Lock()
def test():
    for i in range(5):
        t = my_thread()
        t.start()
if __name__ == '__main__':
    test()

python 多线程中常用到的几个方法,链接地址：http://blog.chinaunix.net/uid-27571599-id-3484048.html