GET请求/百度贴吧 有bug

#  -*- coding:utf-8 -*-
import urllib, urllib2
import re
import sys

class Cuzz():
    """这是一个类"""
    def __init__(self, url, header, start_page, end_page):
        self.url = url 
        self.header = header
        self.start_page = start_page
        self.end_page = end_page

    def deal_url(self):
        """处理url"""
        for i in range(self.start_page, self.end_page+1):
            num = 50*(i-1)
            url = self.url+str(num)
            request = urllib2.Request(url, headers=self.header)
            response = urllib2.urlopen(request)
            htmltext = response.read()
            self.load_images(htmltext)


    def load_images(self, htmltext):
        """下载图片"""
        # 找出这一页的所有帖子类似这样的/p/1111111111
        pattern = re.findall(r"/p/d+", htmltext)        
        for temp in pattern:
            url = "http://tieba.baidu.com" + temp
            request = urllib2.Request(url, headers=self.header)
            response = urllib2.urlopen(request)
            htmltext1 = response.read()
            self.save_images(htmltext1)


    def save_images(self, htmltext1):
        """保存到本地"""
        image_links = re.findall(r"https://imgsa.baidu.+?.jpg",htmltext1)    
        for url in image_links:
            request = urllib2.Request(url, headers=self.header)
            response = urllib2.urlopen(request)
            htmltext1 = response.read()
            print htmltext1
            with open("./images/"+str(url[-10:-1]), "w") as f:
                f.write(htmltext1)

def main():
    """控制"""
    header = {"User-Agent":"Mozilla/5.0(WindowsNT6.1;rv:2.0.1)Gecko/20100101Firefox/4.0.1"}
    title = raw_input("请输入您要下载的贴吧:")
    keyword = {"kw":title} # 是一个字典的格式,转换后"kw=%34dgfdg%fg
    
    keyword = urllib.urlencode(keyword) # 有中文需要转成url的格式
    
    url = "https://tieba.baidu.com/f?" + keyword + "&ie=utf-8&pn="

    start_page = int(raw_input("请输入起始页面:"))
    end_page = int(raw_input("请输入截止页面:"))
    
    
    cuzz = Cuzz(url, header, start_page, end_page)
    cuzz.deal_url()