TestFlightX
@TestFlightX · Post #34663 · 18.11.2024 г., 15:04
#SERVICE#ON#DEMAND https://testflight.apple.com/join/QbJtD54y
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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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Venture Village Wall 🦄
@venturevillagewall · Post #3445 · 19.12.2024 г., 12:00
Bitcoin Demand vs. Supply Dynamics Satoshi anticipated individuals like Michael Saylor would attempt to buy large Bitcoin supply. Bitcoin's scarcity drives prices up as demand increases, making further purchases expensive. The challenge lies in acquiring more coins when prices rise due to limited supply. 🔥 #Bitcoin#Demand#Supply#MichaelSaylor#PriceRise#Scarcity#CryptoNews#Investment#MarketDynamics#Satoshi#Finance#Trend#Economics#Growth#Assets#Strategy
Venture Village Wall 🦄
@venturevillagewall · Post #4137 · 13.02.2025 г., 04:00
Massive HEX Transfer to Burn Address 🚨 Over 50 billion #HEX tokens valued at $199 million transferred to a Burn Address from an unknown wallet, reports Whale Alert. 🟠 In other news, VanEck's Matthew Sigel forecasts that demand from 20 US Bitcoin Reserve bills could result in states purchasing over 242,787 Bitcoin, translating to a $114 billion opportunity! More details on the transfer can be found here. #HEX#Bitcoin#Crypto#WhaleAlert#VanEck#BTC#Blockchain#Finance#Investing#Ethereum#Markets#US#Reserve#Bill#Demand#Tokens#BurnAddress#Wallet#Value#Opportunity
Venture Village Wall 🦄
@venturevillagewall · Post #4307 · 04.03.2025 г., 22:00
Crypto News Highlights: Market Moves & Updates 🚨 494,153 #SOL ($71.95M) transferred to Coinbase Institutional. 📉 SEC drops lawsuit against Cumberland DRW amid Trump admin crypto probe. 🇸🇻 El Salvador's President Bukele affirms ongoing Bitcoin purchases despite IMF's demands. ⚡ Belarus to boost cryptocurrency mining, leveraging excess electricity. 💰 BlackRock posits demand exceeds Bitcoin supply among US millionaires. Check for detailed insights: Whale Alert, SEC News, El Salvador Update, Belarus Mining #SOL#Crypto#SEC#Bitcoin#ElSalvador#Belarus#Mining#BlackRock#Finance#Blockchain#MarketUpdates#CryptoNews#WhaleAlert#IMF#Regulations#Energy#Millionaires#Demand#MarketMovements#Institutional#CryptoInvesting