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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
Пребарај: #riftvalley
@interesting_planet_facts · Post #527 · 09.08.2025 г., 13:22
🌎 In Kenya’s Rift Valley, the Lake Bogoria geysers shoot steaming water up to 5 meters high, fueled by underground heat and minerals. These hot springs nurture thousands of pink flamingos that gather for the rich algae—a natural wonder of water, heat, and color. ✨ #geyser⚡#flamingo⚡#RiftValley 👉subscribe Interesting Planet
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@ethiopia · Post #228 · 12.12.2025 г., 08:33
🌊 ETHIOPIA: AFRICA'S WATER TOWER ኢትዮጵያ፡ የአፍሪካ የውሃ ማማ ЭФИОПИЯ: ВОДОНАПОРНАЯ БАШНЯ АФРИКИ Where legends begin - where life flows! 💙 ━━━━━━━━━━━━━━━━ 💙 LAKE TANA (ጣና ሀይቅ) - SOURCE OF THE NILE This is where Africa's greatest river is born: 🌊THE BLUE NILE: • Ethiopia provides 85% of the Nile's water! • 3,600 km² of pristine water • Flows 1,450 km from Tana to Sudan • "አባይ ወንዝ" (Abay) - Mother of Rivers 🏝️37 ISLAND MONASTERIES: • Some over 800 years old • Ancient manuscripts preserved • Traditional papyrus boats (tankwa) still used • Living history on water "The Blue Nile carries Ethiopia's gift to Africa and the world"🌍💙 ━━━━━━━━━━━━━━━━ 🏞️ GREAT RIFT VALLEY LAKES የሪፍት ሸለቆ ሀይቆች Nature's masterpieces: 🌅LAKE LANGANO: • Only swimmable rift lake! • Black volcanic beaches • Resort paradise 🦩LAKE ABIJATA & SHALA: • Thousands of pink flamingos • Alkaline waters = unique ecosystem • National Park protection • Photographers' dream 💚LAKE ZIWAY: • Thriving fishing communities • 300+ bird species • Fresh tilapia straight from water 🌋LAKE CHAMO: • "Crocodile market" - hundreds sunbathing! • Giant Nile crocodiles (6+ meters!) • Hippo pods & boat safaris Africa's Great Rift Valley creates magic in Ethiopia!✨ ━━━━━━━━━━━━━━━━ 💧 THE WATER TOWER OF AFRICA 🌍THE NUMBERS: • 12 major river basins • 11 lakes (8 in Rift Valley) • 122 billion m³ annual water resources • 85% of Nile water from Ethiopia • Water source for 11 African countries "ውሃችን የአፍሪካ ህይወት ነው" (Our water is Africa's life) ━━━━━━━━━━━━━━━━ 🌱 PROTECTING THE SOURCE Conservation efforts: ✅ Reforestation (billions of trees!) ✅ Lake protection zones ✅ Sustainable fishing ✅ Community conservation ✅ Research programs Preserving water = preserving life for all Africa💚 ━━━━━━━━━━━━━━━━ 🎒 EXPERIENCE ETHIOPIA'S WATERS Must-visit: 🚣LAKE TANA: • Island monastery tours • Traditional tankwa boats • Blue Nile Falls nearby • Coffee ceremony on shore ☕ 🏖️RIFT VALLEY CIRCUIT: • Beach resorts at Langano • Flamingo watching at Abijata • Crocodile tours at Chamo • Bird watching paradise 📸BLUE NILE FALLS: • "Tis Issat" (ጥስ እሰት) - "Water that Smokes" • 400m wide in rainy season • Rainbow mist all day • One of Africa's most spectacular waterfalls ━━━━━━━━━━━━━━━━ 🌊 WHY THIS MATTERS FOR ETHIOPIA: 💧 Water security for 120+ million 🌾 Agriculture & food production ⚡ Hydropower generation 🎣 Fishing community livelihoods FOR AFRICA: 🌍 Life source for Egypt, Sudan, South Sudan 💚 Regional water cooperation 🤝 Shared prosperity FOR THE WORLD: 🌱 Sustainable water management model 🦩 Biodiversity conservation 📚 Ancient wisdom meets modern stewardship ━━━━━━━━━━━━━━━━ 💙 FUN FACTS: 🤯 Ancient Egyptians called Ethiopia "Land of Gods"! 🤯 Lake Tana at 1,788m altitude - "highland sea" 🤯 Blue Nile's name from black sediment that looks blue 🤯 Some monasteries have 1300s manuscripts! 🤯 Rift Valley = tectonic plates separating! 🤯 Flamingos migrate in thousands - pink clouds! ━━━━━━━━━━━━━━━━ 🌊 FROM SOURCE TO SEA Ethiopia's water journey: Lake Tana → Blue Nile → Sudan → Egypt → Mediterranean 6,650 km sustaining 300+ million people "From Ethiopia's highlands - life flows to the world"🌍💙 ━━━━━━━━━━━━━━━━ NEXT:⚡ How Ethiopia turns water into POWER! ━━━━━━━━━━━━━━━━ 🌍 ETHIOPIA | ЭФИОПИЯ | ኢትዮጵያ 📱 Join us: @ethiopia telegram #EthiopiaWater#LakeTana#BlueNile#RiftValley#SourceOfTheNile#EthiopianLakes#AfricaWater#NileRiver