08.三国章节（xpath）

import requests
from lxml import etree
url='https://www.shicimingju.com/book/sanguoyanyi.html'
headers={
    'User-Agent':'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0'
}
response=requests.get(url=url,headers=headers)
page_text=response.text
tree=etree.HTML(page_text)
story_list=tree.xpath('//div[@class="book-mulu"]/ul/li/a/text()')
for story_name in story_list:
    with open('./三国.txt','a',encoding='utf-8')as fp:
        fp.write(story_name+'\n')