这里有新鲜出炉的 Python3 Cookbook 中文版,程序狗速度看过来!
Python 是一种面向对象、解释型计算机程序设计语言,由 Guido van Rossum 于 1989 年底发明,第一个公开发行版发行于 1991 年。Python 语法简洁而清晰,具有丰富和强大的类库。它常被昵称为胶水语言,它能够把用其他语言制作的各种模块(尤其是 C/C++)很轻松地联结在一起。
这篇文章主要介绍了 Python 实现多并发访问网站功能, 结合具体实例形式分析了 Python 线程结合 URL 模块并发访问网站的相关操作技巧, 需要的朋友可以参考下
本文实例讲述了 Python 实现多并发访问网站功能。分享给大家供大家参考,具体如下:
- # Filename:visitweb_threads.py
- # Description:python visit web, get startTime, endTime, everytimes spentTime,threading
- import threading
- import urllib
- import time
- import datetime
- print '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'M %s Spent:%7s seconds'%(i,url,span))
- file.write(u'M %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()
来源: http://www.phperz.com/article/17/0709/336785.html