Python线程池代码

# !/usr/bin/env python # -*- coding:utf-8 -*- # ref_blog:http://www.open-open.com/home/space-5679-do-blog-id-3247.html import Queue import threading import time class WorkManager(object): def __init__(self, work_num=1000,thread_num=2): self.work_queue = Queue.Queue() self.threads = [] self.__init_work_queue(work_num) self.__init_thread_pool(thread_num) """ 初始化线程 """ def __init_thread_pool(self,thread_num): for i in range(thread_num): self.threads.append(Work(self.work_queue)) """ 初始化工作队列 """ def __init_work_queue(self, jobs_num): for i in range(jobs_num): self.add_job(do_job, i) """ 添加一项工作入队 """ def add_job(self, func, *args): self.work_queue.put((func, list(args)))#任务入队，Queue内部实现了同步机制 """ 检查剩余队列任务 """ def check_queue(self): return self.work_queue.qsize() """ 等待所有线程运行完毕 """ def wait_allcomplete(self): for item in self.threads: if item.isAlive():item.join() class Work(threading.Thread): def __init__(self, work_queue): threading.Thread.__init__(self) self.work_queue = work_queue self.start() def run(self): #死循环，从而让创建的线程在一定条件下关闭退出 while True: try: do, args = self.work_queue.get(block=False)#任务异步出队，Queue内部实现了同步机制 do(args) self.work_queue.task_done()#通知系统任务完成 except Exception,e: print str(e) break #具体要做的任务 def do_job(args): print args time.sleep(0.1)#模拟处理时间 print threading.current_thread(), list(args) if __name__ == '__main__': start = time.time() work_manager = WorkManager(10, 2) work_manager.wait_allcomplete() end = time.time() print "cost all time: %s" % (end-start)

这里，我使用的官网的progressbar组件，打算在多线程中进行使用。

主要方法和属性如下：

• currval: current value of the progress, 0 <= currval <= maxval
• maxval: maximum (and final) value of the progress
• finished: True if the bar is have finished (reached 100%), False o/w
• start_time: first time update() method of ProgressBar was called
• seconds_elapsed: seconds elapsed since start_time
• percentage(): percentage of the progress (this is a method)

我打算在wait_allcomplete()函数中进行修改

def wait_for_complete( self ): for item in self.threads: if item.isAlive(): item.join() pbar = ProgressBar(maxval = len(self.threads)) pbar.start()#开始显示进度条 step = 0 i=0 while True: for td in self.threads: if td.isAlive() == False: step += 1 pbar.update(step)#进度更新 pbar.finish()

主要思路就是：当有一个线程退出的时候就更新下进度条，但执行的时候，以上代码没能达到预期。
希望大家帮忙看下问题出在哪里