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: #freshwater
@amazingeo · Post #463 · 19.11.2025 г., 12:31
🌍 Canada’s Manitoulin Island is the largest freshwater island in the world. It’s so big that it contains more than 100 lakes, and some of those lakes have islands of their own. ✨ #islands⚡#freshwater⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #203 · 09.09.2025 г., 03:12
🌍 In Canada’s Hudson Bay lowlands, vast freshwater wetlands cover over 300,000 square kilometers. This area stores so much water it helps regulate the region’s climate and slow permafrost thaw. ✨ #wetlands⚡#freshwater⚡#climate⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@amazingeo · Post #172 · 04.09.2025 г., 03:12
🌍 Just 0.001% of all water on Earth is found in rivers, lakes, and the atmosphere. The vast majority is locked away in ice sheets, glaciers, or underground where we rarely see it. ✨ #hydrology⚡#watercycle⚡#freshwater⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@amazingeo · Post #706 · 03.05.2026 г., 20:31
🌍 Some freshwater wetlands form floating islands—mats of living plants thick enough to walk on. These islands create unique microhabitats and drift slowly across lakes or shallow wetlands. ✨ #wetlands⚡#freshwater⚡#ecology⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #60 · 16.08.2025 г., 16:12
🌍 The world's largest freshwater reserves are hidden underground as groundwater, not in lakes or rivers. These reserves are vital for drinking water and irrigation in many regions. ✨ #groundwater⚡#freshwater⚡#resources⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@amazingeo · Post #695 · 19.04.2026 г., 20:31
🌍 Siberia's Lake Baikal holds more water than all the North American Great Lakes combined. It is the world’s deepest and oldest lake, home to unique species found nowhere else. ✨ #lake⚡#freshwater⚡#biodiversity⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #96 · 22.08.2025 г., 14:06
🌍 Lake Baikal in Russia holds about 20% of the world’s unfrozen freshwater. It’s also the oldest and deepest lake on the planet, reaching depths of over 1,640 meters. ✨ #Baikal⚡#freshwater⚡#depth⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍