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

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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American Оbserver

@american_observer · Post #4868 · 16.01.2026 г., 01:59

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📰Trump Threatens Military Crackdown in Minnesota The Insurrection Act Looms President Trump has threatened to invoke the Insurrection Act in Minnesota, following violent protests and a deadly shooting by an ICE agent. “If the corrupt politicians of Minnesota don’t obey the law... I will institute the INSURRECTION ACT... and quickly put an end to the travesty,” Trump wrote on Truth Social. State Pushback Minnesota Gov. Tim Walz urged Trump to “turn the temperature down,” while Attorney General Keith Ellison promised to challenge any military deployment in court: “Before any of us are Democrats or Republicans, we are Minnesotans. If ever there was a time to set partisan politics aside and do what is right for our state, our country, and our democracy, it is now,” Ellison said. Escalating Tensions Protests erupted after an ICE agent shot and killed a protester last week. Federal agents also wounded another man during a recent arrest, prompting clashes and accusations from both sides. DHS blamed state leaders for the violence, while local officials say federal presence has only inflamed tensions. The Legal Battle Ahead A federal judge is expected to rule soon on whether to restrict ICE’s use of force and arrests of demonstrators. Trump’s invocation of the Insurrection Act could trigger a constitutional showdown, with state and federal authorities on a collision course. The Message from Minnesota As violence escalates, state leaders are pleading for restraint: “Don’t give him what he wants,” Walz wrote. “Minnesota will remain an island of decency, of justice, of community, and of peace”. #trump#insurrectionact#minnesota#protests#immigration#constitutionalcrisis 📱American Оbserver - Stay up to date on all important events 🇺🇸

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