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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
Пребарај: #query
@WritersCafe · Post #521 · 25.12.2025 г., 14:03
New#query by 8047007036from@WritersClub: 🤔 Hi i wanna ask something ,in your free time what genre do you guys like to read in fictional novels- comic ,medical ,sci-fi,mystery, teen romance ,historical , murder mystery. Please do tell 👉🏻Answer in comments below!
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@WritersCafe · Post #520 · 24.12.2025 г., 05:41
New#query by 200078866from@WritersClub: 🤔 list the publishing platforms / agencies where a new writer can publish their work. Please mention whether they are free / paid and preferably their plans and contact / website. 👉🏻Answer in comments below!
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@WritersCafe · Post #513 · 26.08.2025 г., 08:32
New#query by 7273588002from@WritersClub: 🤔 I want to publish my book where can I...? 👉🏻Answer in comments below!
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@WritersCafe · Post #402 · 24.10.2023 г., 10:10
New#query by 5135634813from@WritersClub: 🤔 How long should the first chapter of a novel be?? 👉🏻Answer in comments below!
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@WritersCafe · Post #398 · 13.01.2023 г., 15:09
New#query by 5135634813from@WritersClub: 🤔 I want to describe a scene where two people ( a girl and a boy ) Are standing in front of each other's and thinking simultaneously. Is it possible to describe there thoughts together? If yes then please anyone help me with an example. 👉🏻Answer in comments below!
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@WritersCafe · Post #374 · 24.07.2022 г., 14:27
New#query by 5135634813from@WritersClub: 🤔 I've been working on some fictional plot for months, but I am unable to find right words. Also how do I decide what's better voice for the novel male female or 3rd person??? 👉🏻Answer in comments below!
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@WritersCafe · Post #361 · 03.07.2022 г., 08:54
New #query by 136817688 from @WritersClub: 🤔 What makes a poem good? Rhythm, rhyme, skills with words or pure emotions? 👉🏻 Answer in comments below!
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@WritersCafe · Post #334 · 09.10.2021 г., 05:14
New#query by 1736858014from@WritersClub: 🤔 Which is the best book or website to learn poetic devices? 👉🏻Answer in comments below!
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@WritersCafe · Post #332 · 19.09.2021 г., 11:53
New#query by 200078866from@WritersClub: 🤔 I want some korean names and also some Japanese names for my character, please suggest. 👉🏻Answer in comments below!
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@WritersCafe · Post #330 · 03.08.2021 г., 17:00
New#query by 826179191from@WritersClub: 🤔 How can I share my work and request others to check it? 👉🏻Answer in comments below!
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@WritersCafe · Post #328 · 28.07.2021 г., 15:00
New#query by 1423706429from@WritersClub: 🤔 How to illustrate parents in a novel written as a first person (Either by calling 'mum/dad' or by specifying their names)? 👉🏻Answer in comments below!
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@WritersCafe · Post #325 · 27.06.2021 г., 03:37
New#query by 1183521428from@WritersClub: 🤔 Can i share links of my blogs? 👉🏻Answer in comments below!
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