Python多并发访问网站

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Python多并发访问网站
# Filename:visitweb_threads.py# Description:python visit web, get startTime, endTime, everytimes spentTime,threadingimport threadingimport urllib             import timeimport datetimeprint 'num       web             SpentTime'def Process(url,n):    minSpan = 0.0    maxSpan = 0.0    sumSpan= 0.0    over1s = 0    file = open('data.txt','a')  # save Data    for i in range(n):        startTime =datetime.datetime.now()        try:            urlItem = urllib.urlopen(url)            htmSource = urlItem.read()            urlItem.close()        except:            pass        endTime = datetime.datetime.now()        span = (endTime-startTime).total_seconds()        sumSpan = sumSpan + span        if span < minSpan:            minSpan = span        if span > maxSpan:            maxSpan = span        if span>1:            over1s=over1s + 1        print(u'%4d %s Spent:%7s seconds'%(i,url,span))        file.write(u'%4d %s ST:%s ET:%s Spent :%s seconds\n'%(i,url,startTime,endTime,span))    file.write('\n')    print(u'\n requested:%s times\n Total Spent:%s seconds\n avg:%s seconds\n max:%s seconds\n min:%s seconds\n over 1 secnod:%s times\n'%(n,sumSpan,sumSpan/n,maxSpan,minSpan,over1s))    file.write(u' requested:%s times\n Total Spent:%s seconds\n avg:%s seconds\n max:%s seconds\n min:%s seconds\n over 1 secnod:%s times\n'%(n,sumSpan,sumSpan/n,maxSpan,minSpan,over1s))    file.close()class ThreadClass(threading.Thread):    def run(self):        now = datetime.datetime.now()        print "%s says Hello World at time: %s" % (self.getName(), now)        file = open('threads_data.txt','a') # save threads_data        file.write( "%s says Hello World at time: %s\n" % (self.getName(), now))        Process('http://222.20.6.184/main.aspx',10)  # visit website 网站的Url和每个进程的访问次数        now = datetime.datetime.now()        print "%s says Goodbye at time: %s" % (self.getName(), now)        file.write( "%s says Goodbye at time: %s\n" % (self.getName(), now))        file.close()if __name__=='__main__':#    file = open('threads_data.txt','w')#    file.close()#    file = open('data.txt','w')#    file.close()    for i in range(1000): # 多少次同时并发访问        t = ThreadClass()        t.start()
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