使用 pandas 将嵌套 json 转换为 csv

Question

我正在尝试将嵌套的 json 转换为 csv 文件，但我正在努力解决文件结构所需的逻辑：它是一个包含 2 个对象的 json，我只想将其中一个对象转换为 csv，这是带嵌套的列表。

我在这篇博文中发现了非常有用的“扁平化”json 信息。我基本上已经根据我的问题调整了它，但它仍然对我不起作用。

我的 json 文件如下所示：

{
  "tickets":[
    {
      "Name": "Liam",
      "Location": {
        "City": "Los Angeles",
        "State": "CA"
      },
      "hobbies": [
        "Piano",
        "Sports"
      ],
      "year" : 1985,
      "teamId" : "ATL",
      "playerId" : "barkele01",
      "salary" : 870000
    },
    {
      "Name": "John",
      "Location": {
        "City": "Los Angeles",
        "State": "CA"
      },
      "hobbies": [
        "Music",
        "Running"
      ],
      "year" : 1985,
      "teamId" : "ATL",
      "playerId" : "bedrost01",
      "salary" : 550000
    }
  ],
  "count": 2
}

到目前为止，我的代码如下所示：

{
  "tickets":[
    {
      "Name": "Liam",
      "Location": {
        "City": "Los Angeles",
        "State": "CA"
      },
      "hobbies": [
        "Piano",
        "Sports"
      ],
      "year" : 1985,
      "teamId" : "ATL",
      "playerId" : "barkele01",
      "salary" : 870000
    },
    {
      "Name": "John",
      "Location": {
        "City": "Los Angeles",
        "State": "CA"
      },
      "hobbies": [
        "Music",
        "Running"
      ],
      "year" : 1985,
      "teamId" : "ATL",
      "playerId" : "bedrost01",
      "salary" : 550000
    }
  ],
  "count": 2
}

我想要获得的是 csv 中每张票的 1 行，标题为：

Name,Location_City,Location_State,Hobbies_0,Hobbies_1,Year,TeamId,PlayerId,Salary。

我真的很感激任何可以点击的东西！谢谢你！

Answer 1

事实上，我最近写了一个名为cherrypicker的包来处理这类事情，因为我不得不经常这样做！

我认为下面的代码会给你你所追求的：

from cherrypicker import CherryPicker
import json
import pandas as pd

with open('file.json') as file:
    data = json.load(file)

picker = CherryPicker(data)
flat = picker['tickets'].flatten().get()
df = pd.DataFrame(flat)
print(df)

这给了我输出：

  Location_City Location_State  Name hobbies_0 hobbies_1   playerId  salary teamId  year
0   Los Angeles             CA  Liam     Piano    Sports  barkele01  870000    ATL  1985
1   Los Angeles             CA  John     Music   Running  bedrost01  550000    ATL  1985

您可以使用以下命令安装该软件包：

pip install cherrypicker

...还有更多文档和指南https://cherrypicker.readthedocs.io。