Everything Science
@everything_science · Post #3429 · 01.05.2025 г., 15:50
This is an indoor pig farm in Hubei, China, housing almost 1 million pigs. The pigs never see the outside. #Country 🔔@Everything_Science
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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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Everything Science
@everything_science · Post #3428 · 01.05.2025 г., 05:45
Japanese man's dream Ferrari burned down just 1 hour after he bought it after 10 years of saving💔 #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3420 · 29.04.2025 г., 05:14
Police in Brazil patrol on water buffalos instead of horses. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3416 · 26.04.2025 г., 16:51
Students are required to wear anti cheating headgear during their midterm exam in a university in the Philippines #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3412 · 24.04.2025 г., 06:59
There’s a religion in Nigeria called Chrislam. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3408 · 22.04.2025 г., 19:43
In Switzerland, if you fail your practical driver’s license test 3 times, you are required to consult an official psychologist to assess the reasons for your previous failures before you are allowed to retake the exam. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3404 · 19.04.2025 г., 20:28
Indian army spent 6 months watching "Chinese spy drones," which actually were the planets Jupiter & Venus. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3395 · 13.04.2025 г., 18:43
After 10 PM, you cannot flush the toilet in Switzerland, it is illegal. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3379 · 05.04.2025 г., 19:21
Saudi arabia is turning the Desert green With a bold plan to plant 10 Billion trees, they're leading the fight against climate change. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3360 · 29.03.2025 г., 20:24
Ugandan Politician, Evelyn Anite took back an ambulance she donated to her district, after losing an election in 2021. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3354 · 25.03.2025 г., 16:15
In Spain, it is a tradition for hunters to kill their Spanish Greyhound hunting dogs at the end of the hunting season. Young healthy dogs are hung, shot, maimed and/or strangled and left to die. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3349 · 22.03.2025 г., 12:17
Moscow street dogs display specialized behaviors that differentiate them from domesticated dogs & wolves: pack leaders tend to be the most intelligent rather than the strongest, and packs tend to deploy its cuter members first, as they are more successful in begging for food from people. #Country 🔔@Everything_Science
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