编写python爬虫时显示AttributeError: module 'lxml.etree' has no attribute 'xpath'

问题遇到的现象和发生背景

编写爬虫运行结果报错

问题相关代码，请勿粘贴截图

import requests
from lxml import html
etree= html.etree
if __name__ == '__main__':
    #对下述url发起请求解析出视频详情页的url和视频的名称
    url = "https://www.pearvideo.com/category_5"
    headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.93 Safari/537.36"}
    page_text=requests.get(url,headers).text
    tree=etree.HTML(page_text)
    li_list=tree.xpath('//ul[@class="listvideo-list clearfix"]/li')
    for li in li_list:
        detail_url='https://www.pearvideo.com/'+li.xpath('./div/a/@href')[0]
        # name=li.xpath=('./div/a/div[2]/text()')+".mp4"
        #对详情页发起请求
        detail_page_text=requests.get(url=detail_url,headers=headers).text
        #从详情页中解析出视频对应的url
        root=etree.xpath("detail_page_text")
        mp4_url=root.xpath('//div[@id="poster"]/img/@src')[0]

        print(mp4_url)

运行结果及报错内容

root=etree.xpath("detail_page_text")

AttributeError: module 'lxml.etree' has no attribute 'xpath'

我的解答思路和尝试过的方法

我想要达到的结果

你是不是想这样

import requests
from lxml import html

etree = html.etree
if __name__ == '__main__':
    # 对下述url发起请求解析出视频详情页的url和视频的名称
    url = "https://www.pearvideo.com/category_5"
    headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.93 Safari/537.36"}
    page_text = requests.get(url, headers).text
    tree = etree.HTML(page_text)
    li_list = tree.xpath('//ul[@class="listvideo-list clearfix"]/li')
    for li in li_list:
        detail_url = 'https://www.pearvideo.com/' + li.xpath('./div/a/@href')[0]
        # name=li.xpath=('./div/a/div[2]/text()')+".mp4"
        # 对详情页发起请求
        detail_page_text = requests.get(url=detail_url, headers=headers).text
        # 从详情页中解析出视频对应的url
        detail_tree = html.etree.HTML(detail_page_text)
        root = detail_tree.xpath("detail_page_text")
        mp4_url = detail_tree.xpath('//div[@id="poster"]/img/@src')[0]

        print(mp4_url)

有用记得点个采纳