如何规范化嵌套的 .json？

问题描述

所以我使用 MapBox Web API 并返回了一个 .json。我在解析 .jsons 时遇到了麻烦和困难。我面临的挑战之一是返回的 .json 是嵌套的。这是 .json：

{
   "type":"FeatureCollection","query":[
      -73.989,40.733
   ],"features":[
      {
         "id":"locality.12696928000137850","type":"Feature","place_type":[
            "locality"
         ],"relevance":1,"properties":{
            "wikidata":"Q11299"
         },"text":"Manhattan","place_name":"Manhattan,New York,United States","bBox":[
            -74.047313153061,40.679573,-73.907,40.8820749648427
         ],"center":[
            -73.9597,40.7903
         ],"geometry":{
            "type":"Point","coordinates":[
               -73.9597,40.7903
            ]
         },"context":[
            {
               "id":"place.2618194975964500","wikidata":"Q60","text":"New York"
            },{
               "id":"district.12113562209855570","wikidata":"Q500416","text":"New York County"
            },{
               "id":"region.17349986251855570","wikidata":"Q1384","short_code":"US-NY",{
               "id":"country.19678805456372290","wikidata":"Q30","short_code":"us","text":"United States"
            }
         ]
      },{
         "id":"region.17349986251855570","place_type":[
            "region"
         ],"properties":{
            "wikidata":"Q1384","short_code":"US-NY"
         },"text":"New York","place_name":"New York,United
States","bBox":[
            -79.8578350999901,40.4771391062446,-71.7564918092633,45.0239286969073
         ],"center":[
            -75.4652471468304,42.751210955
         ],"coordinates":[
               -75.4652471468304,42.751210955
            ]
         },"context":[
            {
               "id":"country.19678805456372290",{
         "id":"country.19678805456372290","place_type":[
            "country"
         ],"properties":{
            "wikidata":"Q30","short_code":"us"
         },"text":"United States","place_name":"United States","bBox":[
            -179.9,18.8163608007951,-66.8847646185949,71.4202919997506
         ],"center":[
            -97.9222112121185,39.3812661305678
         ],"coordinates":[
               -97.9222112121185,39.3812661305678
            ]
         }
      }
   ],"attribution":"NOTICE: © 2021 MapBox and its suppliers. All
rights reserved. Use of this data is subject to the MapBox Terms of Service
(https://www.mapBox.com/about/maps/). This response and the information it contains may not be
retained. POI(s) provided by Foursquare."
}

我能够使用以下代码片段将其加载到数据帧中：

url = "https://api.mapBox.com/geocoding/v5/mapBox.places/-73.989,40.733.json?
types=country,region,locality&access_token=MY_KEY_HERE"

data = json.loads(requests.get(url).text)

df = json_normalize(data,'features')

return df

但是，我发现我需要向其中添加 [query]，因此我将相关药水修改为如下所示：

url = "https://api.mapBox.com/geocoding/v5/mapBox.places/-73.989,'features',['query'])

return df

（我遵循的语法来自 documentation）

我得到的错误说明：

ValueError: 值的长度与索引的长度不匹配。

查询字段看起来像这样...

我不确定错误说明了什么以及如何解决它。

这是我想要的输出数据帧：

我可以清理和删除不需要的字段，但无法显示 [query] 字段。

解决方法

在 query 之后添加列 json_normalize：

df.insert(0,'query',[data['query']] * len(df))

json normalize pandas pandas python