使用python遍历嵌套列表以获取特定值

Question

我有一个 json 文件，我试图从多个“区域”中提取“代码”

我可以单独提取代码，但我觉得应该有一个 for 循环我可以编写来自动迭代每个“区域”，因为我不会总是只有 3 个区域。

我尝试了以下嵌套循环的多种变体，但我无法让它迭代

for areas in data:
   for area in areas:
      print(area['code']

当前python代码：

import json

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


    print(data['areas'][0]['area']['code'])
    print(data['areas'][1]['area']['code'])
    print(data['areas'][2]['area']['code'])

JSON 文件：

"areas": [
      {
         "slotId": "slot1",
         "area": {
            "id": "southern",
            "code": "southern",
            "label": "southern area",
            "featureToggles": [],
            "featureChoices": []
         },
         "editable": true,
         "areaCategoryId": null
      },
      {
         "slotId": "slot2",
         "area": {
            "id": "easter",
            "code": "eastern",
            "label": "eastern area",
            "featureToggles": [],
            "featureChoices": []
         },
         "editable": true,
         "areaCategoryId": null
      },
      {
         "slotId": "slot3",
         "area": {
            "id": "western",
            "code": "western",
            "label": "western area",
            "featureToggles": [],
            "featureChoices": []
         },
         "editable": true,
         "areaCategoryId": null
      }

预期结果是为每个区域打印出“代码”。它正确地做到了。但是，我想遍历它，而不必每次都添加新行，因为这既荒谬又乏味。

Answer 1

访问 data['areas'] 这是一个列表，然后遍历它以获取单个 area 对象

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

    for area in data['areas']:
        print(area['area']['code'])