data = {'first': 'true', 'pn': page, 'kd': lang_name}

import requests

def get_json(url, page, lang_name):
   headers = {
       'Host': 'www.lagou.com',
       'Connection': 'keep-alive',
       'Content-Length': '23',
       'Origin': 'https://www.lagou.com',
       'X-Anit-Forge-Code': '0',
       'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0',
       'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
       'Accept': 'application/json, text/javascript, */*; q=0.01',
       'X-Requested-With': 'XMLHttpRequest',
       'X-Anit-Forge-Token': 'None',
       'Referer': 'https://www.lagou.com/jobs/list_python?city=%E5%85%A8%E5%9B%BD&cl=false&fromSearch=true&labelWords=&suginput=',
       'Accept-Encoding': 'gzip, deflate, br',
       'Accept-Language': 'en-US,en;q=0.9,zh-CN;q=0.8,zh;q=0.7'
   }
   data = {'first': 'false', 'pn': page, 'kd': lang_name}
   json = requests.post(url, data, headers=headers).json()
   list_con = json['content']['positionResult']['result']
   info_list = []
   for i in list_con:
       info = []
       info.append(i.get('companyShortName', '無'))
       info.append(i.get('companyFullName', '無'))
       info.append(i.get('industryField', '無'))
       info.append(i.get('companySize', '無'))
       info.append(i.get('salary', '無'))
       info.append(i.get('city', '無'))
       info.append(i.get('education', '無'))
       info_list.append(info)
   return info_list

def main():
   lang_name = 'python'
   wb = Workbook()
   conn = get_conn()
   for i in ['北京', '上海', '廣州', '深圳', '杭州']:
       page = 1
       ws1 = wb.active
       ws1.title = lang_name
       url = 'https://www.lagou.com/jobs/positionAjax.json?city={}&needAddtionalResult=false'.format(i)
       while page < 31:
           info = get_json(url, page, lang_name)
           page += 1
           import time
           a = random.randint(10, 20)
           time.sleep(a)
           for row in info:
               insert(conn, tuple(row))
               ws1.append(row)
   conn.close()
   wb.save('{}職位信息.xlsx'.format(lang_name))

if __name__ == '__main__':
   main()