基于Python实现的爬虫源码（1）

# -*- coding: utf-8 -*-import string,urllib2import osimport shutil#os.rmdir("baidu_file")path = os.getcwd()#os.removedirs(path + '//baidu_file')#shutil.copytree（ResDir,DesDir）#拷贝Dir = path + '//baidu_file'#如果有这个文件夹先删除if os.path.exists(Dir) == True :shutil.rmtree(Dir)#删除文件夹os.mkdir("baidu_file")#新建文件夹os.chdir("baidu_file")#改变当前目录def baidu(url,start_page,end_page):for i in range(start_page,end_page + 1):sName = string.zfill(i,5) + ".html"f = open(sName,'w+')m = urllib2.urlopen(url+str(i)).read()f.write(m)#将字符串写入文件，没有返回值。f.close()print("请输入贴吧地址")bdurl = "http://tieba.baidu.com/p/2296017831?pn="start_page = 1;end_page = 5baidu(bdurl,start_page,end_page)