pydantic kwargs的类型提示？

Question

from typing import Any
from datetime import datetime
from pydantic import BaseModel

class Model(BaseModel):
   timestamp: datetime
   number: int
   name: str

def construct(dictionary: Any) -> Model:
   return Model(**dictionary)

construct({"timestamp": "2024-03-14T10:00:00Z", "number": 7, "name":"Model"})

Argument 1 to "Model" has incompatible type "**dict[str, str]"; expected "datetime"
Argument 1 to "Model" has incompatible type "**dict[str, str]"; expected "number"
Argument 1 to "Model" has incompatible type "**dict[str, str]"; expected "name"

在construct里用什么类型提示代替Any呢？

比如说，如果我把dict[str, str]作为类型放进去，我会得到错误。

Answer 1

def construct(dictionary: dict[str, Any]) -> Model:
    return Model(**dictionary)

def construct(dictionary: dict[str, Union[str, int]]) -> Model:
    return Model.model_validate(dictionary)

或者，你可以用 Union 来声明更具体的类型，然后使用 model_validate 方法来验证输入的数据，而不是用模型的构造函数。