python - 在 Python 中递归遍历字典？

Question

递归遍历字典的更好方法是什么？ 我可以使用 lambda 或/和列表推导来完成吗？

我有:

[
  {
    "id": 1,
    "children": [
      {
        "id": 2,
        "children": []
      }
    ]
  },
  {
    "id": 3,
    "children": []
  },
  {
    "id": 4,
    "children": [
      {
        "id": 5,
        "children": [
          {
            "id": 6,
            "children": [
              {
                "id": 7,
                "children": []
              }
            ]
          }
        ]
      }
    ]
  }
]

我要:

[1,2,3,4,5,6,7]

Answer 1

你可以递归地遍历你的字典，使用这个通用的生成器函数，就像这样

def rec(current_object):
    if isinstance(current_object, dict):
        yield current_object["id"]
        for item in rec(current_object["children"]):
            yield item
    elif isinstance(current_object, list):
        for items in current_object:
            for item in rec(items):
                yield item

print list(rec(data))
# [1, 2, 3, 4, 5, 6, 7]