百度搜索结果 url 爬虫 ，怎么实现爬指定 1 到 10 页的结果（现在是固定爬取某一页的 url）

#coding=utf-8 import urllib2 import urllib import sys import re #from selenium import webdriver #from selenium.webdriver.common.keys import Keys import time

#url = "href = "http://www.baidu.com/link?url=bu4fsa-txw7aHhz0LEu-Ej8ON__uS6btmV_mo7nI2O0_qKtfc-3rJHSyXnYOINHSgDASX4R1V6GcjE2UBGFdjZ9ahmEbG2gsGGW6MVW7pQm"" #print url pattern = re.compile(r"href = "( http://www.baidu.com/link?url=.+?)"") #rehh = re.findall(pattern, url)

#for i in rehh: #print i

with open('data.txt','a+') as f: key_word = [] with open('key_word.txt','r') as kf: for line in kf: request = urllib2.Request('http://www.baidu.com/s?wd='+line.decode('gbk').encode('utf-8')+'&pn=0') response = urllib2.urlopen(request)

        #print response.read()
        #pattern = re.compile(r"href = \"(.+?)\"")
        rehh = re.findall(pattern, response.read())

        for i in rehh:
            request2 = urllib2.Request(i)
            response2 = urllib2.urlopen(request2)

            print response2.geturl()
            f.write(response2.geturl())
            f.write('\n')

f.close() kf.close()