需求：使用bs4实现将诗词名句网站中三国演义小说的每一章的内容爬去到本地磁盘进行存储 

 http://www.shicimingju.com/book/sanguoyanyi.html

 1 from bs4 import BeautifulSoup
 2 import requests
 3 
 4 url = 'http://www.shicimingju.com/book/sanguoyanyi.html'
 5 headers = {
 6     'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36'
 7 }
 8 
 9 page_text = requests.get(url=url,headers=headers).text
10 
11 #解析：章节的标题  详情页的url
12 soup = BeautifulSoup(page_text,'lxml')
13 li_list = soup.select('.book-mulu > ul > li')
14 fp =  open('./xiaoshuo.txt','w',encoding='utf-8')
15 for li in li_list:
16     title = li.a.string
17     detail_url = 'http://www.shicimingju.com'+li.a['href']
18     
19     #对详情页发起请求
20     detail_page_text = requests.get(url=detail_url,headers=headers).text
21     soup = BeautifulSoup(detail_page_text,'lxml')
22     #返回的文本内容是一整个字符串数据
23     text = soup.find('div',class_='chapter_content').text
24     
25     fp.write(title+"\n"+text)
26 fp.close()
27 print('over!!!')

爬虫代码