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”中仅提取“代码”

我可以单独提取代码，但是我觉得应该有一个for循环，我可以编写它以自动遍历每个“区域”，因为我不会总是只有3个区域。

我已经尝试了以下嵌套循环的多种变体，但我无法对其进行迭代

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

当前的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
      }

预期结果是每个区域都会打印出“代码”。 它正确地做到了。 但是，我想遍历整个过程而不必每次都添加新行，因为那简直是荒谬而又乏味的。

Answer 1

访问作为列表的data['areas'] ，然后对其进行迭代以获取各个area对象

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

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