python爬虫，请求不报错也不出现想要获取的信息

这是什么错误啊，为啥网上找不到这类型的问题，好多次都是这样的问题，网上还找不到，希望给俺细说一下下

img

在url_dataList中获取的url有的不是网址的完整形式，只是相对路径 ，需要进行拼接，类似于base_url+rel_url

import random
import time
import requests
from lxml import etree
import pymongo

#添加用户代理池

def R_ua():
uapools = [
"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Firefox/93.0",
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36",
"Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko"
]
#取ua值
r_ua = random.choice(uapools)
return r_ua

def req(url):
headers = {}
headers["User-Agent"] = R_ua()
data = requests.get(url=url,headers=headers).text
html_data = etree.HTML(data)
#进入页面
url_dataList = html_data.xpath('//div[@class="tp-cards-tofu fn-clear"]/ul[@class="viewlist_ul"]/li[@name="lazyloadcpc"]/a/@href')
for car_data in url_dataList:
try:
time.sleep(random.randint(1,5))
headers["User-Agent"]=R_ua()
detil_data = requests.get(url=car_data,headers=headers).text
detil_data = etree.HTML(detil_data)
#标题
car_title=detil_data.xpath('//div[@class="cards-bottom"]/h4/text()')

        data={
            "标题":car_title
        }
        print(data)
    except Exception as e:
        print(e)

if name == 'main':
url="https://www.che168.com/zhengzhou/b/#pvareaid=100649#filter"
req(url)
这是源代码