python爬虫出错各位大神能不能帮我看一下是什么问题？python2.7

import urllib2
import urllib
import re

class BDTB:
def init(self,baseUrl,see_LZ):
self.baseURL = baseUrl
self.seeLZ = '?see_lz='+str(see_LZ)

def getPage(self,pageNum):
    try:
        url = self.baseURL + self.seeLZ + '&pn=' + str(pageNum)
        request = urllib2.Request(url)
        response  =urllib2.urlopen(request)
        return response
    except urllib2.URLError , e:
        if hasattr(e,"reason"):
            print u"link fail,reason",e.reason
            return None
def getTitle(self):
    page = self.getPage(1)
    pattern = re.compile('<h3 class="core_title_txt.*?>(.*?)</h3>',re.S)
    result = re.search(pattern,page)
    if result:
        print result.group(1)
        return result.group(1).strip()
    else:
        return None

def getPageNum(self):
    page = self.getPage(1)
    print page.read()
    pattern = re.compile('<li class="l_reply_num.*?</span>.*?<span.*?>(.*?)</span>', re.S)
    result = re.search(pattern, page)
    if result:
        print result.group(1)
        return result.group(1).strip()
    else:
        return None

def getContent(self):
    page = self.getPage(1)
    pattern = re.complie('<div id="post_content_.*?>(.*?)</div>',re.S)
    items = re.findall(pattern,page)
    for item in items:
        print item

baseURL = "http://tieba.baidu.com/p/4866982459"
bdtb = BDTB(baseURL,1)
#bdtb.getPage(1)
#bdtb.getTitle()
#bdtb.getPageNum()
bdtb.getContent()

运行getTitle()的错误：
Traceback (most recent call last):
File "F:\python学习\程序代码\爬虫\123.py", line 51, in
bdtb.getTitle()
File "F:\python学习\程序代码\爬虫\123.py", line 23, in getTitle
result = re.search(pattern,page)
File "C:\Python27\lib\re.py", line 146, in search
return _compile(pattern, flags).search(string)
TypeError: expected string or buffer

运行getPageNum()的错误：
Traceback (most recent call last):
File "F:\python学习\程序代码\爬虫\123.py", line 52, in
bdtb.getPageNum()
File "F:\python学习\程序代码\爬虫\123.py", line 34, in getPageNum
result = re.search(pattern, page)
File "C:\Python27\lib\re.py", line 146, in search
return _compile(pattern, flags).search(string)
TypeError: expected string or buffer

运行getContent()时候发生的错误：
Traceback (most recent call last):
File "F:\python学习\程序代码\爬虫\123.py", line 53, in
bdtb.getContent()
File "F:\python学习\程序代码\爬虫\123.py", line 43, in getContent
pattern = re.complie('