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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 #3501 · 10.06.2025 г., 07:15

If you have $10 in your wallet and no debt, you have more wealth than 25% of Americans. Not because you’re rich… but because debt has so many people buried. A reminder that sometimes, financial peace isn’t about how much you have— It’s about how little you owe. 💡 Stay grounded. Stay grateful ❤️ #Countries 🔔@Everything_Science

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Everything Science

@everything_science · Post #3498 · 08.06.2025 г., 15:35

One of China's richest men, Jack Ma, bought 28,000 acres of U.S. wilderness and turned it into a wildlife sanctuary. #Countries 🔔@Everything_Science

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Everything Science

@everything_science · Post #3323 · 07.03.2025 г., 19:24

Chinese government takes its officials and members of their families on prison tours on a regular basis to give officials an introduction to what awaits them if they should engage in corruption. The tours include meet-and-greets with former government officials who were caught for corruption. #Countries 🔔@Everything_Science

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Everything Science

@everything_science · Post #3292 · 19.02.2025 г., 08:24

In Finland, the official World Wife-Carrying Championships have been held since 1992. In this competition, men carry their wives as fast as possible through a long obstacle course. In the end, the winner gets a beer for his wife's weight. #Countries 🔔@Everything_Science

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Amazing Geography 🌍

@amazingeo · Post #47 · 14.08.2025 г., 13:12

🌍 Monaco is the most densely populated country on Earth, with over 25,000 people per square kilometer. This tiny city-state squeezes more residents into each square mile than anywhere else. ✨ #population⚡#density⚡#Monaco⚡#countries⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍

🇿🇦🌍South Africa is the 25th largest country in the world. It borders Namibia, Botswana, Zimbabwe, Mozambique, Eswatini (formerly Swaziland), and Lesotho. 🌊 On the west, South Africa is washed by the Atlantic Ocean, while to the south and southeast it is bordered by the Indian Ocean. 📏 Its area is about 1.21 million sq. km — roughly twice the size of France or three times the size of Germany. 🏞 The country consists of nine provinces. #Geography#SouthAfrica#Africa#Countries#Facts#DidYouKnow

Lesson 20 of my Uzbek self-study course with audio is here! Learn how to say countries, nationalities and languages in Uzbek. The lesson includes exercises, tables, a crossword puzzle and clear grammar explanations. https://yep.uz/en/2025/09/lesson-20-countries-nationalities-languages-uzbek/ #uzbeklanguage#learnuzbek#uzbeklesson#languages#nationalities#countries#selfstudy#languagelearning