Три способа выполнить множество задач с asyncio
Функция для примера:
async def do_it(n):
await asyncio.sleep(random.uniform(0.5, 1))
return n
1. Последовательный вызов
async def main():
for i in range(100):
result = await do_it(i)
Такой вызов имеет смысл только тогда, когда результат одной задачи требуется для вызова следующей.
Если они независимы, то это антипаттерн, так как аналогичен простому синхронному вызову по очереди.
2. Упорядоченный результат
async def main():
tasks = [do_it(i) for i in range(100)]
results = await asyncio.gather(*tasks)
Выполняет корутины конкурентно и возвращает результат в виде списка.
Полезен когда требуется получить результаты в том же порядке в котором задачи отправлены.
3. Результат по мере готовности
tasks = [asyncio.create_task(do_it(i)) for i in range(100)]
for cor in asyncio.as_completed(tasks):
result = await cor
Так же выполняет корутины конкурентно, но не гарантирует порядок. Результат возвращается по мере готовности, каждый отдельно.
Полезен когда нужно обработать любой ответ как можно скорее.
#async
The Tuskegee Study was a government experiment from 1932 to 1972. It involved Black men with syphilis who were told they were getting free health care. But doctors did not give them medicine to cure the disease. They just watched the sickness get worse. The men did not know the truth and were not allowed to leave the study. This caused a lot of harm and suffering.
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HeLa cells – taken from Henrietta Lacks in 1951 without her consent – became the first immortal human cell line.
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Her story highlights major ethical questions in science and patient rights.
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Active euthanasia is when a doctor directly ends a patient’s life, like using a lethal injection. Passive euthanasia is when doctors stop treatment or life support, letting the person die naturally.
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Many people find passive euthanasia more acceptable. Active euthanasia is more controversial. People worry about abuse or moral problems. Support often depends on whether a person is terminally ill or in unbearable suffering.
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