python爬取数据时报错问题

soup.select报错
str object has no attribute select

import requests
from bs4 import BeautifulSoup

if __name__ == '__main__':
    url = 'http://www.shicimingju.com/book/sanguoyanyi.html'
    headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 ('
                             'KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36 Edg/105.0.1343.27'}
    page_text = requests.post(url=url, headers=headers)
    # print(page_text)
    soup = BeautifulSoup(page_text.content, 'lxml')
    dd_list = soup.select('a')
    print(dd_list)