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
👀 Well, would you look at that! 👆
Reached 9th TP in the VIP HTL channel!
ACCESS TO MANUAL TRADING for 70usdt/month
💰Turn data into gains with Propheta AI Analyzer: deep AI analysis spots trends with surgical precision, tweaks in seconds to your goals, and pair hunting pumps your trading to the next level — this is the evolution of the game! GET THE ACCESS
Register and get bonuses up to $6,000
Binance | OKX | ByBit👈🏻click!
#trading#AItrader#cryptonews
Oops, we did it again 🤣
Reached 9th TP in just 5 hours in the VIP HTL channel!
Easy $318 with a 5% entry and a $1000 deposit!
Every day we're on fire! 🔥🔥🔥ACCESS TO MANUAL TRADING for 70usdt/month
👉 Not sure? Considering? Contemplating? Come have a look at our performance reports, spend about5 minutes and see for yourself that everything is 100% legit! @propheta_reports
Register and get bonuses up to $6,000
Binance | OKX | ByBit👈🏻click!
#bitcoin#AItrader#tradingview
Oops, we did it again 🤣
Reached 9th TP in just 1 day in the VIP CLUB channel!
You could've earned $311 with a 5% entry and a $1000 deposit!
ACCESS TO MANUAL TRADING for 70usdt/month
👉 Did you know that our referral partners receive extra discounts, even cumulative with the special offer prices?
START >>> Referral Program
Register and get bonuses up to $6,000
Binance | OKX | ByBit👈🏻click!
#AItrader#signalchannel#buycrypto
Oops, we did it again 🤣
Reached 9th TP in the VIP PRO channel!
You could've earned $603 with a 5% entry and a $1000 deposit!
Feels good to be a Propheta VIP, man... 🏖ACCESS TO MANUAL TRADING for 70usdt/month
👉 Multiplying deposits every day!
Not convinced? Contact us for a free trial - @propheta_help
Register and get bonuses up to $6,000
Binance | OKX | ByBit👈🏻click!
#AItrader#passiveincome#cryptochannel
👆 OMG! Would you look at that 👀
Reached 9th TP in just 11 hours in the VIP PRO channel!
$409 in profits with a 5% entry and a $1000 deposit!
That's why we call it the "Money Printer" 💴💷💵ACCESS TO MANUAL TRADING for 70usdt/month
👉 Did you know that many traders use our performance reports to build their own trading strategy? That's how useful they are! Check them out: @propheta_reports
Register and get bonuses up to $6,000
Binance | OKX | ByBit👈🏻click!
#AItrader#passiveincome#crypto
Oops, we did it again 🤣
Reached 9th TP in the VIP HTL channel!
$203 in profits with a 5% entry and a $1000 deposit!
That's why we call it the "Money Printer" 💴💷💵ACCESS TO MANUAL TRADING for 70usdt/month
💪Rule the market with Propheta AI Signals: ultra-sharp alerts, full-on process automation, and a killer Cornix synergy — your fast track to max profits! GET THE ACCESS TO AI SIGNALS
Register and get bonuses up to $6,000
Binance | OKX | ByBit👈🏻click!
#buyeth#cryptobot#AItrader
Reached 9th TP in just 3 hours in the VIP PRO channel!
Easy $513 with a 5% entry and a $1000 deposit!
Every day we're on fire! 🔥🔥🔥ACCESS TO MANUAL TRADING for 70usdt/month
👉 Time to start earning for real!
Join us >>> t.me/ProphetaAdmin_bot
Register and get bonuses up to $6,000
Binance | OKX | ByBit👈🏻click!
#cryptochannel#signalchannel#AItrader
Now that's trading 👆🔥🔥🔥
Reached 9th TP in the VIP PRO channel!
Easy $100 with a 5% entry and a $1000 deposit!
VIPs getting filthy rich by the day ☺️🤑🤑ACCESS TO MANUAL TRADING for 70usdt/month
👉 Looking at those reports and can't believe what you're seing?
Go to our reports channel and audit us! @propheta_reports
Register and get bonuses up to $6,000
Binance | OKX | ByBit👈🏻click!
#AItrader#passiveincome#CryptoSignal
👆 Propheta living up to its name yet again 🔮
Reached 9th TP in just 36 minutes in the VIP PRO channel!
$277 in profits with a 5% entry and a $1000 deposit!
That's why we call it the "Money Printer" 💴💷💵ACCESS TO MANUAL TRADING for 70usdt/month
👉 Did you know that our referral partners receive extra discounts, even cumulative with the special offer prices?
START >>> Referral Program
Register and get bonuses up to $6,000
Binance | OKX | ByBit👈🏻click!
#buycrypto#tradingbot#AItrader
👀 Well, would you look at that! 👆
Reached 9th TP in just 1 day in the VIP PRO channel!
$620 in profits with a 5% entry and a $1000 deposit!
That's why we call it the "Money Printer" 💴💷💵ACCESS TO MANUAL TRADING for 70usdt/month
👉 Did you know that our referral partners receive extra discounts, even cumulative with the special offer prices?
START >>> Referral Program
Register and get bonuses up to $6,000
Binance | OKX | ByBit👈🏻click!
#AItrading#ethereum#AItrader
👍 This is why we're here!
Reached 9th TP in the VIP HTL channel!
Feels good to be a Propheta VIP, man... 🏖ACCESS TO MANUAL TRADING for 70usdt/month
💸Turn time into cash with Propheta AI Signals: pinpoint entries and exits, AI-powered automation, and perfect Cornix compatibility — your automated win streak! GET THE ACCESS TO AI SIGNALS
Register and get bonuses up to $6,000
Binance | OKX | ByBit👈🏻click!
#tradingbot#signalchannel#AItrader
👀 Well, would you look at that! 👆
#ENAUSDT has just reached 9th TP in the VIP CLUB channel!!!👍
With a 5% entry and a $1000 deposit, you could've earned $461!
Every day we're on fire! 🔥🔥🔥ACCESS TO MANUAL TRADING for 70usdt/month
👉 Not sure? Considering? Contemplating? Come have a look at our performance reports, spend about5 minutes and see for yourself that everything is 100% legit! @propheta_reports
Register and get bonuses up to $6,000
Binance | OKX | ByBit👈🏻click!
#AItrader#cryptobot#cryptochannel