Python实现爬取逐浪小说的方法

#-*-coding:utf8-*-
#!/usr/bin/python
# Python:   2.7.8
# Platform:  Windows
# Program:   Get Novels From Internet
# Author:   wucl
# Description: Get Novels
# Version:   1.0
# History:   2015.5.27 完成目录和url提取
#       2015.5.28 完成目录中正则提取第*章，提取出章节链接并下载。在逐浪测试下载无误。
from bs4 import BeautifulSoup
import urllib2,re
def get_menu(url):
  """Get chapter name and its url"""
  user_agent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0"
  headers = {'User-Agent':user_agent}
  req = urllib2.Request(url,headers = headers)
  page = urllib2.urlopen(req).read()
  soup = BeautifulSoup(page)
  novel = soup.find_all('title')[0].text.split('_')[0]
  # 提取小说名
  menu = []
  all_text = soup.find_all('a',target="_blank")
  # 提取记载有小说章节名和链接地址的模块
  regex=re.compile(ur'\u7b2c.+\u7ae0')
  # 中文正则匹配第..章，去除不必要的链接
  for title in all_text:
    if re.findall(regex,title.text):
      name = title.text
      x = [name,title['href']]
      menu.append(x)
      # 把记载有小说章节名和链接地址的列表插入列表中
  return menu,novel
def get_chapter(name,url):
  """Get every chapter in menu"""
  html=urllib2.urlopen(url).read()
  soup=BeautifulSoup(html)
  content=soup.find_all('p') # 提取小说正文
  return content[0].text
if __name__=="__main__":
  url=raw_input("""Input the main page's url of the novel in ZhuLang\n    Then Press Enter to Continue\n""")
  if url:
    menu,title=get_menu(url)
    print title,str(len(menu))+'\n   Press Enter To Continue  \n' 
    # 输出获取到的小说名和章节数
    for i in menu:
      chapter=get_chapter(i[0],i[1])
      raw_input()
      print '\n'+i[0]+'\n'    
      print chapter
      print '\n'