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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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@giiveaways · Post #3191 · 24.09.2024 г., 19:14

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@Giiveaways · Post #1993 · 06.06.2024 г., 20:49

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@fluencyinenglish · Post #7911 · 21.02.2026 г., 06:08

Spin (verb)/(noun) Verb: to present information in a favorable or strategic way Noun: a biased or strategic way of presenting information Example (verb): The government tried to spin the economic data as a success. دولت تلاش کرد داده‌های اقتصادی را به‌گونه‌ای ارائه کند که موفقیت‌آمیز به نظر برسد. Example (noun): The press secretary put a positive spin on the policy failure. سخنگوی مطبوعاتی به شکست سیاست، تفسیر مثبتی داد. Put a spin on : present something strategically She put a positive spin on the election results. او نتایج انتخابات را به شکل مثبتی تفسیر کرد. Spin doctor : political advisor who manages public perception The spin doctor tried to downplay the scandal. مشاور سیاسی سعی کرد رسوایی را کم‌اهمیت جلوه دهد. #idioms #discourseanalysis #criticalthinking #spin #framing #ielts#cae#fce