from datetime import date, datetime
from typing import List, Union, Optional

from pydantic import BaseModel, UUID4, conlist

from pydantic_factories import ModelFactory


class Person(BaseModel):
    def __init__(self, length):
        super().__init__()
        self.len = length
    id: UUID4
    name: str
    hobbies: List[str]
    age: Union[float, int]
    birthday: Union[datetime, date]


class Pet(BaseModel):
    name: str
    age: int


class PetFactory(BaseModel):
    name: str
    pet: Pet
    age: Optional[int] = None


sample = {
 "name": "John",
 "pet": {
    "name": "Fido",
    "age": 3
 }

}

result = PetFactory(**sample)

print(result)