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
15 hours ago, Antalpha (@AntalphaGlobal) sent 1,000 $XAUT (~$5.16M) into #Bybit, likely to sell.
https://intel.arkm.com/explorer/entity/antalpha
https://x.com/OnchainLens/status/2026838079651328216
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A newly created wallet withdrew 500 $XAUT worth $2.57M from #Bybit.
Address: 0xbe9De876a5Cf802F574899A2763aE6a5D5D93CBa
https://x.com/OnchainLens/status/2029186288763715651
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15 hours ago, Antalpha (@AntalphaGlobal) sent 1,000 $XAUT (~$5.16M) into #Bybit, likely to sell.
https://intel.arkm.com/explorer/entity/antalpha
https://x.com/OnchainLens/status/2026838079651328216
Follow @onchainlens for more onchain updates
13 hours ago, Antalpha (@AntalphaGlobal) sent 1,000 $XAUT (~$5M) into #Bybit, likely to sell.
They still hold 59,033 $XAUT (~$300.69M).
https://intel.arkm.com/explorer/entity/antalpha
https://x.com/OnchainLens/status/2025020760608440597
Follow @onchainlens for more onchain updates
A whale withdrew 593.98 $XAUT worth ($2.78M) from #Bybit in the past 3 days after being dormant for 8 months.
Address - 0x57655B342B7bf1a1134B572e43eB62BBE56BF7CF
Data - @nansen_ai
https://x.com/OnchainLens/status/2018184847295218173
Follow @onchainlens for more onchain updates
The newly created wallet "0x0E4" further withdrew 450 $XAUT worth ($2.51M)from #Bybit.
Now the whale holds 1.25K $XAUT worth $6.98M
Address - 0x0E4F3ed5B2A3dB2A2940c638418530e9f5c4927E
Data - @nansen_ai
https://x.com/OnchainLens/status/2016757455565574543
Follow @onchainlens for more onchain updates
The whale "0x0a5" bought 602.49 $XAUT, worth $3.05M, from #Bybit.
Over the past 4 days, the whale has bought 1,469.29 $XAUT, worth $7.33M, from #Bybit.
https://intel.arkm.com/explorer/address/0x0a5e3968f95d5aD4Fac72E1420A2BFFeedb7cbEB
https://x.com/OnchainLens/status/2015679418803552716
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A wallet linked to the Pendle Team (@pendle_fi) deposited 1.8M $PENDLE, worth $3.61M, into #Bybit after holding it for 3-4 years.
The wallet received these $PENDLE for $266K from the Pendle Vesting Wallet.
Address: 0xf82e1E9381A1d92B5897eBe2F9B61160222f1aeb
https://x.com/OnchainLens/status/2015378723818942854
Follow @onchainlens for more onchain updates
A whale bought 566.80 $XAUT worth ($2.79M) from #Bybit in the past 2 days.
The whale still hold $11.36M $USDT and likely to buy more.
Address - 0x0a5e3968f95d5aD4Fac72E1420A2BFFeedb7cbEB
Data - @nansen_ai
https://x.com/OnchainLens/status/2014673139159240920
Follow @onchainlens for more onchain updates
A whale deposited 665,035 $HYPE, worth $14.54M into #Bybit, making a profit of $7.04M.
The whale initially bought 651,895 $HYPE for $7.5M at a price of $11.5, between Dec 3, 2024, and Dec 8, 2024, and sent it for staking.
https://hyperbot.network/trader/0xffe664491482ae9db6ba9e55c2ed1ea55c700a52
https://hyperevmscan.io/address/0xffe664491482ae9db6ba9e55c2ed1ea55c700a52
https://x.com/OnchainLens/status/2014571958009250155
Follow @onchainlens for more onchain updates
A wallet linked to the Pendle Team (@pendle_fi) deposited 1.8M $PENDLE, worth $3.84M, into #Bybit after holding it for 3 years.
The wallet received these $PENDLE for $266K from the Pendle Vesting Wallet.
Address: 0x6b4166974fcf730d7933656d26d52922ee285cf0
https://x.com/OnchainLens/status/2014514593566248989
Follow @onchainlens for more onchain updates