Python 皮丹蒂克v2中的动态关键点

try 使用PYDANIC对json文件建模，如下所示:

{
    "people": {
        "Jack": {"age": 32, "postcode": 1223},
        "Robert": {"age": 23, "postcode":2354},
        "Sarah": {"age": 55, "postcode":5673}
    }
}

我还有一个我喜欢强制执行的可接受名称的列表:

accepted_names = ["Jack", "Robert", "Sarah", "Alex"]

我曾try 使用__root__:[Dict[str, Dict[str, int]]，但在版本2中不建议使用，错误消息说我应该使用RootModel，但pydatics文档并不清楚如何做到这一点.

到目前为止，我所拥有的是:

import json 
from pydantic import BaseModel, RootModel, conint
from typing import Dict

class PersonModel(BaseModel):
    age: conint(ge=0)
    postcode: conint(ge=1000, le=9999)

class MyModel(RootModel):
    root:Dict[str, PersonModel]

    def validate_root(cls, v):
       acceptable_names =  ["Jack", "Robert", "Sarah", "Alex"]
       if v not in acceptable_names:
            raise ValueError(f"Names should be one of {', '.join(acceptable_names)}")
       return v
        
class ParentModel(BaseModel):
     people: MyModel

file = "scratch/test.json"
with open(file, "r") as f:
        data = json.load(f)

mymodel = ParentModel(**data)

但它现在的工作方式是mymodel.people.root['Jack']，而我想要mymodel.people.Jack