python 用百度获取二级域名列表

#coding=utf-8
import re
import requests
from urllib import parse
#UA信息：
headers = {
    'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36'
}
#quote()编码;unquote()解码;
def baidu_get_towdn(site,a,b):
    sites = []
    for i in range(a,b):   #10页为例(0,10)
        i = i*10
        url = 'https://www.baidu.com/s?wd='+parse.quote(site)+'&pn='+str(i)     #设定url请求
        response = requests.get(url,headers=headers).text   #get请求
        baidudomain = re.findall('style="text-decoration:none;">(.*?)/',response)
        sites += list(baidudomain)
    site = list(set(sites))  #set()实现去重
    print(site)
    print("\nThe number of sites is %d" %len(site))
    for i in site:
        print(i)
        
# baidu_get_towdn('site:baidu.cn',0,10)