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: #railways
@developmentnewsindia · Post #44423 · 05.05.2026 г., 04:33
Indian Railways has officially issued the Gazette Notification for operationalizing the new South Coast Railway Zone. 🔹 Divisions included: • Visakhapatnam • Vijayawada • Guntur • Guntakal #Railways
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@developmentnewsindia · Post #44382 · 04.05.2026 г., 04:04
South Central #Railways seeks ~1,125 acres in Telangana for 4 mega coaching terminals around Hyderabad—sites at Dabilpur (250 acres), Nagulapalli (325), Jukkal (300) and Cherlapalli expansion (250). Plan aims to decongest Secunderabad/Hyderabad/Kacheguda hubs.
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@developmentnewsindia · Post #44336 · 02.05.2026 г., 12:35
Indian Railways Approves ₹895.30 Crore Projects for Power System Upgradation and Bridge Infrastructure ₹671.72 Cr Kolkata Metro Upgrade with 7 New Traction Substations and Power System Augmentation from 11KV to 33 KV for Higher Frequency & Capacity Expansion Approvals to Pave Way for 2.5-Minute Metro Headway Upgrade from Existing 5-Minute Operations, Boosting Line Capacity to Meet Rising Passenger Demand ₹223.58 Cr Adra Bridge Project to Strengthen Critical Freight Route and Industrial Connectivity #Railways
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@developmentnewsindia · Post #43987 · 23.04.2026 г., 16:10
🇮🇳The first prototype of Vande Bharat Cargo has reached Lalitpur Junction & is gearing up for trials.🚆#Railways
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@developmentnewsindia · Post #43761 · 18.04.2026 г., 05:28
Airport-Style Revamp For New Delhi Railway Station With Air Concourse, Elevated Roads. Metro type Entry Gates Source #Railways
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@axelotlogistics · Post #678 · 17.12.2023 г., 18:03
«Узтемирйулконтейнер» преобразовался в «Темирйулкарго»🇺🇿🚆 Не только новое название, но и новые услуги: • по управлению грузоперевозками «от двери до двери» • по формированию логистических центров и терминалов • по созданию логистических цепочек поставок грузов с функцией оперирования мультимодальными логистическими терминалами за рубежом Очень интересно, что из этого получится🚂 #UZBEKISTAN#RAILWAYS
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@developmentnewsindia · Post #44106 · 27.04.2026 г., 06:15
Sikkim’s first railway station Rangpo Terminal takes shape on the Sivok Rangpo line 🚄🇮🇳 ▪️ B+G+5 with local Architecture on 16.5 acres ▪️ Cost : ₹335+ Cr ▪️ Promoter : Northeast Frontier Railway Division ▪️ Contractor : IRCON International Limited ▪️ Status : Under Construction #Railways#Infra
@developmentnewsindia · Post #43785 · 18.04.2026 г., 12:24
601 KM Rail Multi-tracking in UP & Andhra Pradesh #Railways#Infra
@developmentnewsindia · Post #43248 · 05.04.2026 г., 08:41
Railways has set a target to complete the Detailed Project Reports (DPRs) for three bullet train corridors by March 2027. These include the Hyderabad-Chennai, Hyderabad-Bengaluru and Patna-Siliguri. #Railways#Infra
@developmentnewsindia · Post #44064 · 25.04.2026 г., 14:13
#Railways Minister Ashwini Vaishnaw inaugurates Aditya, BEML’s self reliant high speed bullet train plant in Bengaluru 🚄🇮🇳 The facility will build indigenous B28 trains and future B35 next gen sets, boosting Bharat’s push for advanced, homegrown high speed rail. #aatmarnirbharbharat Ashvini Vaishnaw: India’s Aatmanirbhar bullet train B28 is being developed with manufacturing at BEML’s Aditya plant equipped with advanced, high precision machines, including robotic laser welding systems. 🚄🇮🇳
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@developmentnewsindia · Post #43596 · 14.04.2026 г., 14:21
🇮🇳🤝🇧🇩 Bangladesh is moving ahead with a significant upgrade of its railway network, with plans to procure 200 broad-gauge passenger coaches from India in a deal to strengthen capacity and improve services across key routes. #Railways Minister Shaikh Rabiul Alam informed Parliament that deliveries are scheduled to begin in 2026 and will continue in phases until December 2027 #Exports https://swarajyamag.com/news-brief/bangladesh-to-induct-200-indian-broad-gauge-coaches-by-2027-signals-wider-fleet-expansion
@developmentnewsindia · Post #44043 · 24.04.2026 г., 19:44
Indian #Railways is delivering transformation at scale: 55,000 km of track renewed since 2014, 90% fewer rail failures, and track running at 110 kmph+ has risen from 40% to 80%. 🛤🚉 Indian Railways carries 25,000+ trains and 20 million+ passengers daily. Over 80,000 km of stronger rail network, 44,000 km of upgraded sleepers, and 8,00,000 machine-hours logged. When the backbone improves, the impact multiplies across safety, punctuality, logistics, and productivity. That is nation-building in motion. #Reforms#Infra