TGINSIGHT SIMILAR POSTS
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: #bishan
@sgmrt · Post #2244 · 06.02.2025 г., 23:39
[NSL] UPDATE: Due to engineering vehicle fault, please expect longer waiting time of up to 5 mins of NSEWL. Free regular bus services & bridging bus services are available between #Bishan & #Woodlands. Pax are advised to use TEL and CCL. We apologise for the delay. - SMRT
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@sgmrt · Post #2243 · 06.02.2025 г., 23:39
[NSL] UPDATE: Due to engineering vehicle fault, please expect longer waiting time of 5 mins of NSEWL. Free regular bus services & bridging bus services are available between #Bishan & #Woodlands. Pax are advised to use TEL and CCL. We apologise for the delay. - SMRT
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@sgmrt · Post #2318 · 16.04.2025 г., 04:29
[NSL]: Due to a track fault, please add 15mins travel time from #ToaPayoh to #Bishan towards #JurongEast. Free regular buses are available between #ToaPayoh and #Bishan. - SMRT
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@sgmrt · Post #2317 · 16.04.2025 г., 04:14
[NSL]: Due to a track fault, please add 15mins train travel time from #ToaPayoh to #Bishan towards #JurongEast. Free regular buses are available between #ToaPayoh and #Bishan. Please look out for fellow commuters with special needs and lend a helping hand. We are sorry for - SMRT
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@sgmrt · Post #2316 · 16.04.2025 г., 04:05
[NSL]: Due to a track fault, please add 15mins train travel time from #ToaPayoh to #Bishan towards #JurongEast. Free regular bus is available between #ToaPayoh and #Bishan. (Refer to Diagram 1) https://bit.ly/3YBCjlJ - SMRT
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@sgmrt · Post #2314 · 16.04.2025 г., 03:29
[NSL]: Due to a track fault, pls add 15mins train travel time from #ToaPayoh to #Bishan towards #JurongEast. Free regular bus is available between #ToaPayoh and #Bishan. - SMRT
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@sgmrt · Post #2226 · 10.01.2025 г., 10:44
[NSL] CLEARED: Fault cleared, train service between #MarinaSouthPier and #Bishan has resumed. Free regular bus svc btwn #MarinaSouthPier and #ToaPayoh has ceased. - SMRT
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@sgmrt · Post #2225 · 10.01.2025 г., 10:39
[NSL] UPDATE: Train service between #MarinaSouthPier and #Bishan has resumed. Free regular bus svc btwn #MarinaSouthPier and #ToaPayoh has ceased. Trains are running normally. - SMRT
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@sgmrt · Post #2224 · 10.01.2025 г., 10:34
[NSL] UPDATE: Train service between #MarinaSouthPier and #Bishan has resumed. Free regular bus svc btwn #MarinaSouthPier and #ToaPayoh is still available. - SMRT
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@sgmrt · Post #2223 · 10.01.2025 г., 10:29
[NSL] UPDATE: Fault cleared, train svcs are progressively being restored. Pls add 10mins train travel time btwn #MarinaSouthPier and #Bishan. Free regular bus svcs btwn #MarinaSouthPier and #ToaPayoh. - SMRT
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@sgmrt · Post #2222 · 10.01.2025 г., 10:19
[NSL] UPDATE: Fault cleared, train svcs are progressively being restored. Pls add 15mins train travel time btwn #MarinaSouthPier and #Bishan. Free regular bus svcs btwn #MarinaSouthPier and #ToaPayoh. - SMRT
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@sgmrt · Post #2221 · 10.01.2025 г., 10:14
[NSL] UPDATE: Due to a train fault, pls add 20mins train travel time btwn #MarinaSouthPier and #Bishan. Free regular bus svcs btwn #MarinaSouthPier and #ToaPayoh. Our station staff will assist. - SMRT
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