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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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@revheadcrypto · Post #537 · 30.09.2024 г., 05:55

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▎🌿 Introducing the Mazda EZ-6: The Green Liftback! 🚗💚 The Mazda EZ-6, developed in collaboration with Changan, is considered the indirect successor to the iconic gasoline "Six." This innovative model will be available in seven versions — four hybrid and three fully electric options! ⚡️ 🔋Fully Electric Version: - Power: 258 hp electric motor on the rear axle. 🔄Hybrid Versions: - Engine: 1.5L, 95 hp gasoline generator. - Electric Motor: 218 hp for driving wheels. ✨Luxurious Features: - Leather upholstery (base model) - Premium leather and suede options (higher trims) - Sony audio system with 14 speakers 🎶 - Ambient interior lighting 🌈 - Zero-gravity front seats for ultimate comfort 🛋️ - Panoramic sunroof 🌌 - Wireless smartphone charging 📱 - Advanced cruise control 🚦 - 14.6-inch media system powered by Qualcomm Snapdragon 8155. 💰Price Range: 160,000 to 200,000 CNY ($22,800 – $28,500 USD). #MazdaEZ6#GreenDriving#ElectricVehicle#HybridTechnology#LuxuryOnWheels#Auto

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@revheadcrypto · Post #414 · 31.08.2024 г., 16:58

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🚗✨Introducing the All-New Volkswagen Passat in China!🇨🇳 Say hello to the latest sedan that combines sleek design with innovative features! While it may resemble the European wagon, the Chinese Passat boasts a unique look with aggressive bumpers and stylish black accents. 😍 🌟Key Features: - 11.6-inch Passenger Display for ultimate entertainment! 📱 - Convenient Seat Adjustment Button for rear passengers to maximize comfort! 🪑 Under the hood, choose between two powerful turbo engines: - 1.5L with 160 hp ⚡️ - 2.0L with 220 hp 🚀 🗓️Sales Begin on September 10th! #Volkswagen#Passat#NewRelease#China#CarEnthusiasts#Innovation#LuxuryOnWheels#Auto

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@revheadcrypto · Post #263 · 07.08.2024 г., 18:21

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🚗✨Exciting News: Huawei and BAIC's Stelato S9 Gets a Price Cut!✨🚗 The local competitor to the Mercedes-Benz EQS has just launched pre-orders at a new, lower price! Originally priced between 450,000 and 550,000 yuan (approximately $62,000 to $76,000), the Stelato S9 is now available for just 399,800 to 449,800 yuan (about $56,000 to $63,000)! 💰🎉 The base model features a powerful 309-horsepower rear motor, while the premium versions come with an additional front motor boasting 215 horsepower. 🏎️💨 This electric sedan can accelerate from 0 to 100 km/h in just 3.9 seconds! ⚡️🔥 #StelatoS9#Huawei#BAIC#ElectricSedan#PriceCut#LuxuryOnWheels#Auto

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