为什么爬出来的为空，我感觉xpath定位没问题呀

import requests
import json
from lxml import etree
from urllib.parse import urljoin
import pymysql
import re

def bianma(a):
    header = {
        'Host': 'search.51job.com',
        'Upgrade-Insecure-Requests': '1',
        'Cookie': 'guid=3533a9d88fd8fc16736cace8d6acc2b5; nsearch=jobarea%3D%26%7C%26ord_field%3D%26%7C%26recentSearch0%3D%26%7C%26recentSearch1%3D%26%7C%26recentSearch2%3D%26%7C%26recentSearch3%3D%26%7C%26recentSearch4%3D%26%7C%26collapse_expansion%3D; partner=www_baidu_com; search=jobarea%7E%60080200%7C%21ord_field%7E%600%7C%21recentSearch0%7E%60080200%A1%FB%A1%FA000000%A1%FB%A1%FA0000%A1%FB%A1%FA00%A1%FB%A1%FA99%A1%FB%A1%FA%A1%FB%A1%FA99%A1%FB%A1%FA99%A1%FB%A1%FA99%A1%FB%A1%FA99%A1%FB%A1%FA9%A1%FB%A1%FA99%A1%FB%A1%FA%A1%FB%A1%FA0%A1%FB%A1%FApython%A1%FB%A1%FA2%A1%FB%A1%FA1%7C%21recentSearch1%7E%60000000%A1%FB%A1%FA000000%A1%FB%A1%FA0000%A1%FB%A1%FA00%A1%FB%A1%FA99%A1%FB%A1%FA%A1%FB%A1%FA99%A1%FB%A1%FA99%A1%FB%A1%FA99%A1%FB%A1%FA99%A1%FB%A1%FA9%A1%FB%A1%FA99%A1%FB%A1%FA%A1%FB%A1%FA0%A1%FB%A1%FApython%A1%FB%A1%FA2%A1%FB%A1%FA1%7C%21recentSearch2%7E%60000000%A1%FB%A1%FA000000%A1%FB%A1%FA0000%A1%FB%A1%FA00%A1%FB%A1%FA99%A1%FB%A1%FA%A1%FB%A1%FA99%A1%FB%A1%FA99%A1%FB%A1%FA99%A1%FB%A1%FA99%A1%FB%A1%FA9%A1%FB%A1%FA99%A1%FB%A1%FA%A1%FB%A1%FA0%A1%FB%A1%FA%A1%FB%A1%FA2%A1%FB%A1%FA1%7C%21recentSearch3%7E%60080400%A1%FB%A1%FA000000%A1%FB%A1%FA0000%A1%FB%A1%FA00%A1%FB%A1%FA99%A1%FB%A1%FA%A1%FB%A1%FA99%A1%FB%A1%FA99%A1%FB%A1%FA99%A1%FB%A1%FA99%A1%FB%A1%FA9%A1%FB%A1%FA99%A1%FB%A1%FA%A1%FB%A1%FA0%A1%FB%A1%FA%A1%FB%A1%FA2%A1%FB%A1%FA1%7C%21',
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36 Edg/91.0.864.59',
    }
    # html1 = requests.get(a,headers=header).content.decode('utf-8')
    html1 = requests.get(a,headers=header).content.decode('gbk')
    html2 = etree.HTML(html1)
    return html2



def main():
    for i in range(1,60):
        start_url = 'https://search.51job.com/list/080200,000000,0000,00,9,99,python,2,{}.html'.format(i)
        print(start_url)
        href = bianma(start_url).xpath('div[class="j_joblist"]/div[class="e"]/a/@href')
        print(href)


if __name__ == '__main__':
    main()

我检查了一下这个51job网站的页面，job列表的数据应该是动态生成的，所以你直接在这个页面Dom中用Xpath检索是没有结果的。

你要的数据好像在这里：