python百度贴吧爬虫

# -*- coding: utf-8 -*-
#coding=utf-8

import urllib
import urllib2
import re
import thread
import time

class BDTB:
    def __init__(self,baseurl,seeLz):
        self.baseUrl=baseurl
        self.seeLz='?see_lz='+str(seeLz)
        self.Tool=Tool()
    def getPage(self,pageNum):
        try:
            url=self.baseUrl+self.seeLz+'&pn='+str(pageNum)
            request = urllib2.Request(url)
            response = urllib2.urlopen(request)
            return response.read()
        except urllib2.URLError, e:
            print "链接网络失败"+e.reason
            return None
    def getTitle(self):
        html=self.getPage(1)
        pattern = re.compile('core_title_txt pull-left text-overflow.*?>(.*?)</h3>',re.S)
        result =re.search(pattern,html)
        if result:
            print result.group(1)
        else:
            return None
    def getContent(self,page):
        pattern  =re.compile('<div id="post_content_.*?>(.*?)</div>',re.S)
        items = re.findall(pattern,page)
        floor=1
        for i in items:
            print floor,u'楼--------------------------------------------\n'
            print self.Tool.replace(i)
            floor+=1

class Tool:

    #去除img标签,1-7位空格, 

    removeImg = re.compile('<img.*?>| {1,7}|&nbsp;')

    #删除超链接标签

    removeAddr = re.compile('<a.*?>|</a>')

    #把换行的标签换为\n

    replaceLine = re.compile('<tr>|<div>|</div>|</p>')

    #将表格制表<td>替换为\t

    replaceTD= re.compile('<td>')

    #将换行符或双换行符替换为\n

    replaceBR = re.compile('<br><br>|<br>')

    #将其余标签剔除

    removeExtraTag = re.compile('<.*?>')

    #将多行空行删除

    removeNoneLine = re.compile('\n+')

    def replace(self,x):

        x = re.sub(self.removeImg,"",x)

        x = re.sub(self.removeAddr,"",x)

        x = re.sub(self.replaceLine,"\n",x)

        x = re.sub(self.replaceTD,"\t",x)

        x = re.sub(self.replaceBR,"\n",x)

        x = re.sub(self.removeExtraTag,"",x)

        x = re.sub(self.removeNoneLine,"\n",x)

        #strip()将前后多余内容删除

        return x.strip()

baseURL = 'http://tieba.baidu.com/p/3138733512'
bdtb = BDTB(baseURL,2)
bdtb.getContent(bdtb.getPage(2))