Отдельно разберём TaskGroup, который пришел на замену gather в Python 3.11.
Ключевые отличия
▫️create_task() возвращает объект asyncio.Task, у которого есть соответствюущие методы управления. То есть у нас больше контроля
▫️это контекстный менеджер, который гарантирует что все таски будут остановлены по выходу из контекста
▫️ошибка автоматически отменяет незавершенные задачи,
▫️except* передает нам ExceptionGroup, в котором каждую ошибку можно обработать отдельно
import asyncio
import random
async def do_it() -> str:
if random.random() < 0.1:
raise ValueError('Oops')
delay = random.uniform(0.5, 1.5)
await asyncio.sleep(delay)
return delay
async def main():
try:
async with asyncio.TaskGroup() as tg:
for _ in range(10):
tasks.append(tg.create_task(do_it()))
for t in tasks:
print(t.result())
except *ValueError as e:
for err in e.exceptions:
print(err)
asyncio.run(main())
Рекомендую изучить страницу Coroutines and Tasks из документации, где представлено больше интересных примеров и механизмов
- таймауты
- отмена задач
- создание задач из другого потока
#async
🌍 Water molecules in the ocean today could have once traveled through glaciers, rivers, or clouds—completing a global journey called the water cycle that never truly ends. ✨
#hydrology⚡#watercycle⚡#earth⚡#geography⚡#nature
👉subscribe Amazing Geography
👉more Channels
🌍 Some of the water we drink today has cycled through dinosaurs and ancient forests. Water molecules can take thousands of years to complete a single journey through the global water cycle. ✨
#hydrology⚡#watercycle⚡#earth⚡#geography⚡#nature
👉subscribe Amazing Geography🌍
🌍 Water in the atmosphere is always on the move—at any moment, only about 0.001% of Earth’s water is in the air as vapor, yet this tiny fraction drives all rain, snow, and weather worldwide. ✨
#hydrology⚡#watercycle⚡#atmosphere⚡#geography⚡#nature⚡#earth
👉subscribe Amazing Geography
👉more Channels
🌍 Water vapor in the air isn’t just invisible—it’s crucial for moving energy around the planet. When vapor condenses into clouds, it releases heat that drives weather systems worldwide. ✨
#hydrology⚡#atmosphere⚡#watercycle⚡#geography⚡#nature⚡#earth
👉subscribe Amazing Geography
👉more Channels
🌍 About 90% of the water exchanged in the global water cycle happens over the oceans, not land. Yet this invisible ocean-to-sky movement powers most of the world’s rainfall. ✨
#hydrology⚡#watercycle⚡#oceans⚡#geography⚡#nature⚡#earth
👉subscribe Amazing Geography🌍
🌍 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🌍
🌍 The water cycle, or hydrologic cycle, constantly moves water through evaporation, condensation, and precipitation, powering rivers, forming clouds, and shaping climates worldwide. ✨
#watercycle⚡#evaporation⚡#precipitation⚡#geography⚡#nature⚡#earth
👉subscribe Amazing Geography🌍