如何使用Pydantic为一个字段定义两个值类型

from pydantic import BaseModel
from typing import Union

class MyModel(BaseModel):
    my_field: Union[int, str]

# 创建一个实例并验证数据
data = {"my_field": 123}
model = MyModel(**data)
print(model.my_field)  # 输出: 123
print(type(model.my_field))  # 输出: <class 'int'>

data = {"my_field": "abc"}
model = MyModel(**data)
print(model.my_field)  # 输出: abc
print(type(model.my_field))  # 输出: <class 'str'>