本文实例讲述了python基于queue和threading实现多线程下载的方法，分享给大家供大家参考。具体方法如下：
主代码如下：
#download worker queue_download = Queue.Queue(0) DOWNLOAD_WORKERS = 20 for i in range(DOWNLOAD_WORKERS): DownloadWorker(queue_download).start() #start a download worker for md5 in MD5S: queue_download.put(md5) for i in range(DOWNLOAD_WORKERS): queue_download.put(None)
其中downloadworkers.py
类继承 threading.Thread,重载run方法..在__init__中调用threading.Thread.__init__(self),
在run方法中实现耗时的操作
import threading import Queue import md5query import DOM import os,sys class DownloadWorker(threading.Thread): """""" def __init__(self, queue): """Constructor""" self.__queue = queue threading.Thread.__init__(self) def run(self): while 1: md5 = self.__queue.get() if md5 is None: break #reached end of queue #this is a time-cost produce self._down(md5) print "task:", md5, "finished" def _down(self, md5): config = { 'input':sys.stdin, 'output':'./samples', 'location':'xxx', 'has-fn':False, 'options':{'connect.timeout':60, 'timeout':3600}, 'log':file('logs.txt', 'w'), } print 'download %s...' % (md5) try: data = downloadproc(config['location'], config['options'])#我的下载过程 if data: dom, fileData = md5query.splited(data) filename = md5 if config['has-fn']: filename = '%s_%s' % (md5, dom.nodeValue2('xxxxxxx', '').encode('utf-8'))#这是我的下载的方法 f = file(os.path.join(config['output'], filename), 'w') f.write(fileData) f.close() print '%stok' % (md5) else: print>>config['log'], '%st%s' % (md5, 'failed') except Exception, e: print>>config['log'], '%st%s' % (md5, str(e))
希望本文所述对大家的Python程序设计有所帮助。
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