python编程获取《续蜀山剑侠传》目录信息：目录名称和网址

# -*- coding:UTF-8 -*-
import urllib.request, sys
import re
def openUrl(url):
   try:
      page = urllib.request.urlopen(url, data=None, timeout=5)
   except urllib.error.HTTPError as e:
     print(e.code)
     print(e.reason)
     return ''
   except urllib.error.URLError as e:
     print(e.reason)
     return ''
   else:    
      html = page.read().decode('utf-8')
     return html
def getList(html, tag):
   i = html.find(tag)
   if i == -1:
      print ('没有找到' + tag)
     return ''
   else:
      con = html[i+len(tag):]
      #print ("前30个字符：" + con[:30])
      tag = 'ul'
     tag_pat = r'(?<=<'+ tag + '>).*?(?=</' + tag + '>)'  
     tag_ex = re.compile(tag_pat, re.M|re.S)  
      con = re.findall(tag_ex, con)
      #con = html.split('正文')
     #print (con[0])
     return con[0]
def printList(list, host):
   #获取text
   res = r'(.*?)'
   t =  re.findall(res, list, re.S|re.M)
   #获取href
   res_url = r"(?<=href=\").+?(?=\")|(?<=href=\').+?(?=\')"
   h = re.findall(res_url, list, re.I|re.S|re.M)
   
   for i in range(len(t)):
     print (str(i+1) + '\t' + t[i] + '\t' + host + h[i])
def main():
   url = 'http://www.mengxi.net/book/263745/index.html'
   i = url.index('/', 7)
   host = url[0 : i]
   print ('打开' + url)
   html = openUrl(url)
   if len(html) > 0:
      tag = '正文'
      list = getList(html, tag)
     printList(list, host)
main()