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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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Futures <> DEX

@mexcTracker · Post #149339 · 17.04.2026 г., 20:02

Arbitrage with KMNO ended 2m, 3s KMNO | #KMNO| 10.44% | Short 🔴💚👍 Origin: DEX (DUMP) [M: -1% VS D: -10%] Price MEXC: 0.02253 Spot: 0.02268 Price Dexscreener: 0.0204 Chain:#solanaDep✅W/d✅ CA:KMNo3nJsBXfcpJTVhZcXLW7RmTwTt4GVFE7suUBo9sS MEXC DEX MC - $89.38M V1h - $33.31K V24h $116.95K $1.49M Liq - $1.25M Limit $33.80K - Fund 0.0050% - source // chat // me

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Futures <> DEX

@mexcTracker · Post #149338 · 17.04.2026 г., 20:01

Arbitrage with KMNO ended 2m, 29s KMNO | #KMNO| 10.88% | Short 🔴💙👍 Origin: DEX (DUMP) [G: -0% VS D: -10%] Price Gate: 0.02262 Spot: 0.02268 Price Dexscreener: 0.0204 Chain:#solanaDep✅W/d✅ CA:KMNo3nJsBXfcpJTVhZcXLW7RmTwTt4GVFE7suUBo9sS Gate DEX MC - $89.38M V1h - $33.31K V24h $69.69K $1.49M Liq - $1.25M Limit $72.38K - Fund 0.0024% - source // chat // me

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Crypto Headlines

@market_headlines · Post #28350 · 10.04.2026 г., 20:30

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