如何将复杂的json文件建模为python类

Question

是否有任何python助手库可以用来创建模型，用于生成复杂的json文件，如以下所示。我读过关于科兰德的文章，但我不确定它能满足我的需要。下面这个棘手的部分是，trigger-rule部分可能有嵌套的match规则，如https://github.com/adnanh/webhook/wiki/Hook-Rules中所描述的

[
  {
    "id": "webhook",
    "execute-command": "/home/adnan/redeploy-go-webhook.sh",
    "command-working-directory": "/home/adnan/go",
    "pass-arguments-to-command":
    [
      {
        "source": "payload",
        "name": "head_commit.id"
      },
      {
        "source": "payload",
        "name": "pusher.name"
      },
      {
        "source": "payload",
        "name": "pusher.email"
      }
    ],
    "trigger-rule":
    {
      "and":
      [
        {
          "match":
          {
            "type": "payload-hash-sha1",
            "secret": "mysecret",
            "parameter":
            {
              "source": "header",
              "name": "X-Hub-Signature"
            }
          }
        },
        {
          "match":
          {
            "type": "value",
            "value": "refs/heads/master",
            "parameter":
            {
              "source": "payload",
              "name": "ref"
            }
          }
        }
      ]
    }
  }
]

Answer 1

定义一个这样的类：

class AttributeDictionary(dict):
    __getattr__ = dict.__getitem__
    __setattr__ = dict.__setitem__

加载JSON时，将AttributeDictionary作为object_hook传递

import json

data = json.loads(json_str, object_hook=AttributeDictionary)

然后，可以通过将键指定为属性来访问dict条目：

print data[0].id

输出

webhook

注意：，您需要用下划线替换键中的破折号。如果你不这样做，这种方法对那些钥匙就行不通了。