Everything Science
@everything_science · Post #3429 · 01.05.2025 г., 15:50
This is an indoor pig farm in Hubei, China, housing almost 1 million pigs. The pigs never see the outside. #Country 🔔@Everything_Science
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Изворен канал @pythonotes · Post #411 · 9 фев.
reload_flag="" if [[ -n "${DEBUG}" ]]; then reload_flag="--reload" fi if [[ -n "${WORKER_COUNT}" ]]; then workers=${WORKER_COUNT} else workers=2 fi gunicorn --workers ${workers} \ --bind 0.0.0.0:8000 \ ${reload_flag} main.wsgi Писали такие конструкции чтобы проверить наличие флага и сформировать команду правильно? На самом деле можно сделать тоже самое проще. Для этого используются операторы условной подстановки, доступные в оболочках семейства POSIX. :- для установки значений по умолчанию ${WORKER_COUNT:-2} Если переменная не объявлена, то будет дефолтное значение 2. :+ подставляет указанный текст, если переменная не пуста ${DEBUG:+--reload} Если что-то есть в переменной то распечатается текст после символа +, в противном случае - ничего. Удобно для опциональных флагов, как в нашем примере. Итого наш скрипт может выглядеть так: gunicorn --workers ${WORKER_COUNT:-2} \ --bind 0.0.0.0:8000 \ ${DEBUG:+--reload} main.wsgi Есть еще два оператора. := не только подставить дефолтное значение, но и присвоить его переменной, если она пуста # никаких переменных еще нет VAL1=${VAL2:=hello} # теперь доступны обе echo $VAL1 $VAL2 # hello hello :? остановить выполнение с ошибкой, если переменной нет. echo ${MISS:?is required} bash: MISS: is required Код выхода будет 1. #tricks#linux
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Everything Science
@everything_science · Post #3428 · 01.05.2025 г., 05:45
Japanese man's dream Ferrari burned down just 1 hour after he bought it after 10 years of saving💔 #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3420 · 29.04.2025 г., 05:14
Police in Brazil patrol on water buffalos instead of horses. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3416 · 26.04.2025 г., 16:51
Students are required to wear anti cheating headgear during their midterm exam in a university in the Philippines #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3412 · 24.04.2025 г., 06:59
There’s a religion in Nigeria called Chrislam. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3408 · 22.04.2025 г., 19:43
In Switzerland, if you fail your practical driver’s license test 3 times, you are required to consult an official psychologist to assess the reasons for your previous failures before you are allowed to retake the exam. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3404 · 19.04.2025 г., 20:28
Indian army spent 6 months watching "Chinese spy drones," which actually were the planets Jupiter & Venus. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3395 · 13.04.2025 г., 18:43
After 10 PM, you cannot flush the toilet in Switzerland, it is illegal. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3379 · 05.04.2025 г., 19:21
Saudi arabia is turning the Desert green With a bold plan to plant 10 Billion trees, they're leading the fight against climate change. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3360 · 29.03.2025 г., 20:24
Ugandan Politician, Evelyn Anite took back an ambulance she donated to her district, after losing an election in 2021. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3354 · 25.03.2025 г., 16:15
In Spain, it is a tradition for hunters to kill their Spanish Greyhound hunting dogs at the end of the hunting season. Young healthy dogs are hung, shot, maimed and/or strangled and left to die. #Country 🔔@Everything_Science
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Everything Science
@everything_science · Post #3349 · 22.03.2025 г., 12:17
Moscow street dogs display specialized behaviors that differentiate them from domesticated dogs & wolves: pack leaders tend to be the most intelligent rather than the strongest, and packs tend to deploy its cuter members first, as they are more successful in begging for food from people. #Country 🔔@Everything_Science
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