xpath的|

xpath的|

相当与交集

本爬虫爬取的是热门城市和全国城市，但是由于爬取的规则不同，所以在同一个xpath中使用了两种规则

import requests
from lxml import etree

headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36"
}

def work():
    url='https://www.aqistudy.cn/historydata/'
    res=requests.get(url=url,headers=headers).text
    tree=etree.HTML(res)
    #xpath特殊用法|并集
    a_s=tree.xpath("//div[@class='bottom']/ul/li/a | //div[@class='bottom']/ul/div[2]/li/a")

    for i in a_s:
        city_name = i.xpath("./text()")[0]
        print(city_name)
    print(len(a_s))

if __name__ == '__main__':
    work()