xpath解析爬取全国城市名称【★★】

By 大Van家 on 2021-07-23
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复习:XPath语法

需求:解析出所有城市名称

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#!/usr/bin/env python 
# -*- coding:utf-8 -*-
import requests
from lxml import etree

# 项目需求:解析出所有城市名称https://www.aqistudy.cn/historydata/
if __name__ == "__main__":
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36'
}
url = 'https://www.aqistudy.cn/historydata/'
page_text = requests.get(url=url, headers=headers).text

tree = etree.HTML(page_text)
# 解析到热门城市和所有城市对应的a标签
# //div[@class="bottom"]/ul/li/ 热门城市a标签的层级关系
# //div[@class="bottom"]/ul/div[2]/li/a 全部城市a标签的层级关系
a_list = tree.xpath('//div[@class="bottom"]/ul/li/a | //div[@class="bottom"]/ul/div[2]/li/a')
all_city_names = []
for a in a_list:
city_name = a.xpath('./text()')[0]
all_city_names.append(city_name)
print(all_city_names, len(all_city_names))

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