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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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Michaël Van de Poppe Official

@michaelvandepoppeanalyst · Post #4780 · 07.09.2024 г., 08:12

The #Altcoin market capitalization valued in Bitcoin is at the highest level since the end of July. Good perspectives, and it's a pretty substantial breakout. Better times are ahead.

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Michaël Van de Poppe Official

@michaelvandepoppeanalyst · Post #4768 · 05.09.2024 г., 16:43

The #Altcoin markets are reversing. I'm positioned into $OMNI (and under-water), but it's showing a: - Daily bullish divergence. - Reclaiming the level of early August. Expect to see a run of 2-3x in the coming 2-3 months against $BTC value --> the most important metric.

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Michaël Van de Poppe Official

@michaelvandepoppeanalyst · Post #4694 · 31.08.2024 г., 15:48

The #Altcoin market capitalization, valued in Bitcoin, is still consolidating. We're in the middle of that bottoming process, but it's taking a long time. Expecting to see a significant run towards new highs once this starts to turn around.

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Michaël Van de Poppe Official

@michaelvandepoppeanalyst · Post #4605 · 24.08.2024 г., 08:01

Valid falling wedge and bullish divergence on the #Altcoin market capitalization divided by Bitcoin. I think we’re in for a great final part of this year. https://x.com/CryptoMichNL/status/1827254521225162944?t=CykS0U09CC0XSGUvztSAHw&s=19

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Michaël Van de Poppe Official

@michaelvandepoppeanalyst · Post #4379 · 03.08.2024 г., 13:00

The #Altcoin market capitalization is not showing anything massive, yet. Smaller altcoins have been collapsing. The bigger ones still stand, through which this can be seen as a relatively normal consolidation for the entire index. Reversals should come in the coming weeks.

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Michaël Van de Poppe Official

@michaelvandepoppeanalyst · Post #4244 · 20.07.2024 г., 14:05

The total #Altcoin market capitalization has bottomed during the release of the Mt. Gox news. A strong upward bounce, but more importantly, a strong reversal since it tested a higher timeframe support. https://x.com/CryptoMichNL/status/1814661548193034620?t=tmCmHJhGfr0c38lQIfYUfg&s=19

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