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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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⬛️Iqtisodiy faktlar... 🇺🇸AQShdagi Buyuk retsessiya: sabablari, oqibatlari va saboqlari 💵Ushbu iqtisodiy beqarorlik davri 1930-yillardagiBuyuk Depressiyadan keyingi eng jiddiy inqiroz deb hisoblanadi. “Buyuk retsessiya” atamasi 2007-yil dekabridan 2009-yil iyunigacha davom etgan AQSh tanazzuliga ham, 2009-yilda sodir bo‘lgan jahon iqtisodiytanazzulga ham aloqador. 🔎Batafsil 🚩 Великая рецессия в США: причины, последствия и уроки 📊Этот период экономической нестабильности считается самым серьёзным кризисом со времён Великой депрессии 1930-х годов. Термин «Великая рецессия» относится как к рецессии в США, продолжавшейся с декабря 2007 по июнь 2009 года, так и к глобальному экономическому спаду, который последовал в 2009 году. 🔎Подробнее #GraduateSchool#Recession#Decrease#Economy 🔝Web-site |🔝Facebook | 🔝Instagram | 🔝Youtube

📕Iqtisodiy atamalar... 📈 Ushbu davrda kompaniyalar xarajatlarni qisqartirishi, iste’molchilar talabi pasayishi, ishsizlik ortib borishi kuzatiladi, bu esa mamlakatning umumiy iqtisodiy iqlimiga salbiy ta’sir ko‘rsatadi. 🏭 Retsessiya iste’mol xarajatlarining pasayishi, kreditshartlarining yomonlashishi, tashqiiqtisodiy zarbalar yoki investitsiyalarning keskin kamayishi kabi turli omillar tufayli yuzaga kelishi mumkin. 📊 During this time, companies reduce spending, consumer demandfalls, and unemploymentrises, negativelyaffecting the country’s overall economic climate. ⬇️ A recession can be triggered by various factors, such as lower consumer spending, worsening creditconditions, externaleconomic shocks, or a sharp drop in investment. #GraduateSchool#Recession#Decrease#Economy 🔝Web-site |🔝Facebook | 🔝Instagram | 🔝Youtube

Journey to Fluency

@fluencyinenglish · Post #7852 · 05.04.2022 г., 08:31

#common_mistakes #decrease #in#of @fluencyinenglish معمولاً از عبارت زیر برای کاهش در چیزی صحبت می کنیم. ✔️ decrease in sth با این حال،معمولاً از عبارت زیر برای کاهش مقدار بکار می بریم. ✔️ decrease of sth مثال: • There has been a 2% decrease in the rate of unemployment. 2 درصد کاهش در نرخ بیکاری وجود داشته است. • There has been a decrease of 2%. 2 درصد کاهش وجود داشته است. • There was a slight decrease in his weight after a week of dieting. بعد از یک هفته رژیم، یک کاهش کوچک در وزنش وجود داشت. • Any decrease in tourism could have a serious effect on the local economy. هر گونه کاهشی در گردشگری می‌توانست اثری جدی بر اقتصاد محلی بگذارد. • The report's finding on the decrease in violent crime supports the police chief's claims. • We have seen a marked decrease in the number of accidents since these safety measures were introduced. از وقتی این تدابیر امنیتی ارائه شدند، کاهش شدیدی در تعداد تصادفات مشاهده شده است. • We've noticed a steady decrease in jobs available for new graduates in the industry. @fluencyinenglish

Journey to Fluency

@fluencyinenglish · Post #7837 · 18.07.2021 г., 06:26

#common_mistakes #decrease #in#of @fluencyinenglish معمولاً از عبارت زیر برای کاهش در چیزی صحبت می کنیم. ✔️ decrease in sth با این حال،معمولاً از عبارت زیر برای کاهش مقدار بکار می بریم. ✔️ decrease of sth مثال: • There has been a 2% decrease in the rate of unemployment. 2 درصد کاهش در نرخ بیکاری وجود داشته است. • There has been a decrease of 2%. 2 درصد کاهش وجود داشته است. • There was a slight decrease in his weight after a week of dieting. بعد از یک هفته رژیم، یک کاهش کوچک در وزنش وجود داشت. • Any decrease in tourism could have a serious effect on the local economy. هر گونه کاهشی در گردشگری می‌توانست اثری جدی بر اقتصاد محلی بگذارد. • The report's finding on the decrease in violent crime supports the police chief's claims. • We have seen a marked decrease in the number of accidents since these safety measures were introduced. از وقتی این تدابیر امنیتی ارائه شدند، کاهش شدیدی در تعداد تصادفات مشاهده شده است. • We've noticed a steady decrease in jobs available for new graduates in the industry. @fluencyinenglish

Crypto M - Crypto News

@CryptoM · Post #65206 · 12.04.2026 г., 01:42

🚀 Bitcoin(BTC) Drops Below 72,000 USDT with a 1.23% Decrease in 24 Hours On Apr 12, 2026, 01:42 AM(UTC). According to Binance Market Data, Bitcoin has dropped below 72,000 USDT and is now trading at 71,964.390625 USDT, with a narrowed 1.23% decrease in 24 hours. #Bitcoin#BTC#USDT#Binance#cryptocurrency#marketdata#price drop #decrease

Crypto M - Crypto News

@CryptoM · Post #64548 · 09.04.2026 г., 07:21

🚀 Bitcoin(BTC) Drops Below 71,000 USDT with a 1.14% Decrease in 24 Hours On Apr 09, 2026, 07:21 AM(UTC). According to Binance Market Data, Bitcoin has dropped below 71,000 USDT and is now trading at 70,975.132813 USDT, with a narrowed 1.14% decrease in 24 hours. #Bitcoin#BTC#cryptocurrency#USDT#Binance#marketdata#priceupdate#decrease#24hours

Crypto M - Crypto News

@CryptoM · Post #65266 · 12.04.2026 г., 13:01

🚀 Bitcoin(BTC) Drops Below 71,000 USDT with a 2.59% Decrease in 24 Hours On Apr 12, 2026, 13:01 PM(UTC). According to Binance Market Data, Bitcoin has dropped below 71,000 USDT and is now trading at 70,972.90625 USDT, with a narrowed 2.59% decrease in 24 hours. #Bitcoin#BTC#USDT#cryptocurrency#marketupdate#Binance#pricechange#decrease#24hour