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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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AIRDROPS BOSS

@airdropsboss · Post #740 · 02.07.2021 г., 11:17

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AIRDROPS BOSS

@airdropsboss · Post #738 · 01.07.2021 г., 06:57

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#Domain🔥PCOM, The PUSH Community is coming! 🔥 #Kingdom📡Announcing our IDO, set for July 1st, at 4pm UTC📅 #Phylum Every Project NEEDS a PUSH🦸‍♂️ This is where PCOM comes in 🙌 From Tokens/Projects which need that extra nudge💪 To experienced shillers who are looking for their next gig🔍 PCOM is the be-all-end-all destination for all of your promotional and shilling needs✅ You can take part in this amazing opportunity at the ground floor by picking up your tokens during the upcoming IDO! 🌐Official Whitepaper 🌐Official Website PCOM HOME 🌐Official IDO Direct Link PCOM: BUY THE IDO HERE https://cointool.app/ido/exchange?id=236b717277242a232425752a2722277177772023722571267523207272217223222372272622702120756f2625) 🌐Official Facebook 🌐Official Twitter 🌐Official Telegram Group 🌐Official Telegram Announcements 🌐Official BSCScan: [BSCScan](https://bscscan.com/token/0x07ecbe61F8c41A9a724e96781957e236f9A480AD)

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VIP_影视分享

@wangzhuanzhan · Post #33123 · 16.09.2024 г., 05:51

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@nehkers · Post #216 · 11.11.2022 г., 23:46

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