python之jsonpath的使用

import json
import jsonpath
import requests
url="https://www.lagou.com/lbs/getAllCitySearchLabels.json"
headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36"}

html=requests.get(url,headers=headers).text
#把json形式的字符串转换成python格式
unicodestr=json.loads(html)
#利用jsonpath按照指定格式取出内容
city_list=jsonpath.jsonpath(unicodestr,"$..name")
#把python形式的字符串转换成json格式用dumps
#禁用ascii编码格式，返回unicode字符串，方便使用
city_array=json.dumps(city_list,ensure_ascii=False)
with open("lagoucity.json","w") as f:
    f.write(city_array.encode("utf-8"))