Функция asyncio.wait() это еще один способ вызвать множество асинхронных задач.
Она работает в нескольких режимах.
1. Самый простой - ждем завершения всех задач
async def main():
tasks = [asyncio.create_task(do_it(i)) for i in range(10)]
done, pending = await asyncio.wait(
tasks,
return_when=asyncio.ALL_COMPLETED
)
for task in done:
try:
print(task.result())
except Exception as e:
print(e)
Очень похоже на gather, но работает не так.
▫️возвращает не результаты, а два сета с объектами Task у которых можно забрать результат через task.result() если они в списке done
▫️не гарантирует порядок результатов так как оба объекта это set
▫️не выбрасывает исключение когда оно появляется, а сохраняет его в Task. Исключение появится когда попробуете забрать резултьтат.
2. Ждем завершения первой задачи, даже если там ошибка.
async def main():
tasks = [asyncio.create_task(do_it(i)) for i in range(3)]
done, pending = await asyncio.wait(
tasks,
return_when=asyncio.FIRST_COMPLETED
)
# в done может быть несколько задач!
for task in done:
try:
print(task.result())
except Exception as e:
print(f"Fail: {e}")
# Оставшиеся задачи в pending, как правило, нужно отменить, иначе они будут продолжать работать
for task in pending:
task.cancel()
В сете done будут таски которые успели завершится, причем как успешно так и нет.
3. До первой ошибки.
Тоже самое, но с аргументом FIRST_EXCEPTION
done, pending = await asyncio.wait(
tasks,
return_when=asyncio.FIRST_EXCEPTION
)
Функция завершается как только первая задача упадет с ошибкой.
Учтите, что в любом случае done вы можете обранужить несколько задач, как с ошибками так и успешные.
↗️ Полный листинг примеров здесь
#async
#NULS/USDT analysis :
#NULS is currently in a bearish trend, trading below the 200 EMA and consistently making new lows. The price is testing the 200 EMA, with expectations of a rejection at this level, which will lead to a continuation of the bearish momentum and the formation of new lows.
TF : 4h
Entry : $0.2760
Target : $0.2150
SL : $0.3145
#NULS/USDT analysis :
#NULS is currently in a downtrend, establishing lower lows (LLs) and lower highs (LHs) below the 200 EMA. The price has retraced to the resistance zone, and it is anticipated that it will continue its bearish momentum, potentially testing lower levels.
TF : 4h
Entry : $0.2996
Target : $0.2667
SL : $0.3230
#NULS/USDT analysis -
#NULS is trading in a downtrend below the 200 EMA. The price is currently declining from resistance zone and is expected to test the support zone soon.
TF : 1H
Entry : $0.3080
Target : $0.2840
SL : $0.3246
#NULS/USDT analysis -
#NULS is in an uptrend, trading above the 200 EMA. After the breakdown of the previous swing high, the price is now sustaining this level and is expected to continue its bullish momentum to test new highs.
TF : 30min
Entry : $0.3237
Target : $0.3479
SL : $0.3171
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#NULS is ranked 168 in the CoinMarketCap rating.
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