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Изворен канал @pythonotes · Post #397 · 12 ное.

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Использование Pydantic сегодня стало нормой, и это правильно. Но иногда на ревью вижу, что используют его не всегда корректно. Например, метод BaseModel.model_dump() по умолчанию не преобразует стандартные типы, такие как datetime, UUID или Decimal, в простой сериализуемый для JSON вид. Тогда пишут кастмоный сериализатор для этих типов чтобы функция json.dump() не падала с ошибкой. import uuid from datetime import datetime from decimal import Decimal from uuid import UUID from pydantic import BaseModel class MyModel(BaseModel): id: UUID date: datetime value: Decimal obj = MyModel( id=uuid.uuid4(), date=datetime.now(), value='1.23' ) print(obj.model_dump()) # не подходит для json.dump # { # 'id': UUID('4f8c1bc4-25fd-40cd-9dbe-2c73639b0dc1'), # 'date': datetime.datetime(2025, 12, 12, 12, 12, 12, 111111), # 'value': Decimal('1.23') # } # добавляем свой кастомный сериализатор json.dumps(obj.model_dump(), cls=MySerializer) # { # 'id': '4f8c1bc4-25fd-40cd-9dbe-2c73639b0dc1', # 'date': '2025-12-12T12:12:12.111111', # 'value': '1.23' # } В данном случае класс MySerializer обрабатывает datetime, UUID и Decimal. Например так: class MySerializer(json.JSONEncoder): def default(self, o): if isinstance(o, Decimal): return str(o) elif isinstance(o, datetime): return o.isoformat() elif isinstance(o, UUID): return str(o) return super().default(o) Специально для тех, кто всё еще так делает - в этом нет необходимости! Pydantic может это сделать сам, просто нужно добавить параметр mode="json". json.dumps(obj.model_dump(mode="json")) # { # 'id': '4f8c1bc4-25fd-40cd-9dbe-2c73639b0dc1', # 'date': '2012-12-12T12:12:12.111111', # 'value': '1.23' # } #pydantic#libs

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Sickipedia

@sickipedia · Post #9558 · 08.01.2025 г., 11:01

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I had a big fight with my wife, I yelled at her, "When you finally die, I'm getting you a headstone that says, 'Here Lies My Wife - Cold As Ever'." "Yeah well," she shouted back, "When you die, I'm getting you a headstone that says, 'Here Lies My Husband - Stiff At Last." #roast@Sickipedia

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@sickipedia · Post #9550 · 05.01.2025 г., 15:01

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My coworker said: “ You should not eat red meat.” I said, “My grandmother lived to be 97.”… She said, “Did she eat red meat?” I said, “No. She minded her own business.” #roast@Sickipedia

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@sickipedia · Post #9052 · 23.07.2024 г., 11:01

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A man who owned a sausage factory was showing his arrogant asshole son around his factory. Try as he might to impress his snobbish son, his son would just sneer and look down his nose at everything. They approached the heart of the factory, where the father thought, "This should impress him!" He showed his son a machine and said, "Son, this is the heart of the factory. With this machine here we can put in a pig, and out come sausages." The son, unimpressed, said, "Yes, but do you have a machine where you can put in a sausage and out comes a pig?" The father, "Yes son, we call it your mother." #roast @Sickipedia

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@sickipedia · Post #8871 · 22.05.2024 г., 11:01

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Wife: "How would you describe me?" Husband: "ABCDEFGHIJK." Wife: "What does that mean?" Husband: "Adorable, beautiful, cute, delightful, elegant, fashionable, gorgeous, and hot." Wife: "Aw, thank you, but what about IJK?" Husband: "I'm just kidding!" #roast @Sickipedia

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