Python将包含嵌套json的字符串转换为dict

Question

我有以下列表(注意“keyE”有一个字典作为字符串):

[
  {
    "keyA": "Example",
    "keyB": "{\"keyC\":2,\"keyD\":{\"keyE\":\"{\"name\":\"foo\"}\"},\"keyF\":0}"
  },
  {
    "keyA": "Example2",
    "keyB": "{\"keyC\":6,\"keyD\":{\"keyE\":\"{\"name\":\"bar\"}\"},\"keyF\":5}"
  }
]

我想将其转换为这个(它可以有任意数量的嵌套字典和列表):

[
  {
    "keyA": "Example",
    "keyB": {
      "keyC": 2,
      "keyD": {
        "keyE": {
          "name": "foo"
        }
      },
      "keyF": 0
    }
  },
  {
    "keyA": "Example2",
    "keyB": {
      "keyC": 6,
      "keyD": {
        "keyE": {
          "name": "bar"
        }
      },
      "keyF": 5
    }
  }
]

到目前为止，我有以下内容，但我不知道在 json.loads 之后要做什么。我知道我必须递归调用该函数，但不知道如何调用。

import json

def convert(data_list: list) -> list:
  for i in range(len(data_list)):
    obj = data_list[i]

    for key, value in obj.items():
      if isinstance(value, str) and any(char in "{[]}" for char in value):
        try:
          data = json.loads(value)
          # What do I do here?
        except:
          continue

Answer 1

不知道这是否适用于您更复杂的情况，但我能够使用 ast.literal_eval() 和一些非常糟糕的链接 str.replace 调用:

import ast


def replace(s):
    return ast.literal_eval(s.replace(r'"{', "{").replace(r'}"', "}"))


x = [{"keyA": "Example",
      "keyB": "{\"keyC\":2,\"keyD\":{\"keyE\":\"{\"name\":\"foo\"}\"},\"keyF\":0}"},
     {"keyA": "Example2",
      "keyB": "{\"keyC\":6,\"keyD\":{\"keyE\":\"{\"name\":\"bar\"}\"},\"keyF\":5}"}]


for d in x:
    for key, value in d.items():
        if "{" in value:
            d[key] = replace(value)

输出:

In [4]: x
Out[4]:
[{'keyA': 'Example',
  'keyB': {'keyC': 2, 'keyD': {'keyE': {'name': 'foo'}}, 'keyF': 0}},
 {'keyA': 'Example2',
  'keyB': {'keyC': 6, 'keyD': {'keyE': {'name': 'bar'}}, 'keyF': 5}}]

In [5]: x[0]["keyB"]["keyD"]["keyE"]["name"]
Out[5]: 'foo'