TGINSIGHT SIMILAR POSTS
Изворен канал @pythonotes · Post #303 · 27 дек.
Наверняка вы замечали, что в Python есть удобная функция для получения переменной окружения os.getenv(NAME) И её "сестра" для создания или изменения переменных окружения os.putenv(NAME, VALUE) Но почему-то putenv() не работает как должно. Энвайромент не обновляется! os.putenv('MYVAR', '1') print(os.getenv('MYVAR')) ... и ничего 😴 Почему так? На самом деле энвайромент обновляется, но это значение не добавляется в словарь os.environ. Откройте исходник функции os.getenv(). Это просто шорткат для os.environ.get() В то время как putenv() это built-in С-функция. Словарь os.environ (или точней класс из MutableMapping) создаётся из энвайромента в момент инициализации. Функция putenv() самостоятельно его не изменяет. В тоже время, когда вы создаёте или изменяете ключ в os.environ, автоматически вызывается putenv() в методе __setitem__(). То есть, технически putenv() всё делает верно, но в os.environ это не отражается. Можно проверить так: >>> os.putenv('MYVAR', '123') >>> os.system('python -c "import os;print(os.getenv(\'MYVAR\'))"') 123 Я объявил переменную в текущем процессе и вызвал дочерний процесс, который её унаследовал и получил в составе os.environ. Аналогично при удалении переменной вызывается еще одна built-in функция unsetenv(), удаляющая переменную из системы. Итого ▫️ Удобней всего явно обновлять переменные через os.environ ▫️ Есть способ неявно создать/удалить переменную через putenv/unsetenv, что не повлияет на os.environ но изменит энвайромент и передаст изменения сабпроцессам. Но так лучше не делать! ▫️os.environ это просто обертка для built-in функций putenv() и unsetenv(). #basic
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Пребарај: #gleam
@geniusairdropsss · Post #513 · 23.03.2024 г., 16:58
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@geniusairdropsss · Post #511 · 09.03.2024 г., 07:19
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@geniusairdropsss · Post #425 · 27.07.2023 г., 15:41
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@airdropp_io · Post #476 · 07.03.2024 г., 18:58
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@geniusairdropsss · Post #420 · 13.07.2023 г., 08:52
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@tonevents_en · Post #1092 · 19.12.2024 г., 11:26
🙎♂️$10,000 Bombie Giveaway on Gleam This activity will be very useful for everyone who plays Bombie. All you need to do is subscribe to Bombie's TG and Twitter. You will also need the Bombie UID — it is behind the avatar on the left bottom corner. 🎁200 Random Winners Will Share $3,000 in $TON 🛷3,000 Random Winners Will Share $7,000 In-Game BTC and Airdrop Boxes Follow the instructions to earn points. The more points you earn, the more chances you have to win prizes! ‼️ Make sure your #Twitter account has a profile photo, otherwise it will be flagged as a spam. Deadline: December 20, 00:00 (UTC+8） #TON#Bombie#Gleam#airdrop
@tonevents_en · Post #1080 · 15.12.2024 г., 12:32
🙎♂️$10,000 Bombie Giveaway on Gleam This activity will be very useful for everyone who plays Bombie. All you need to do is subscribe to Bombie's TG and Twitter. You will also need the Bombie UID — it is behind the avatar on the left bottom corner. 🎁200 Random Winners Will Share $3,000 in $TON 🛷3,000 Random Winners Will Share $7,000 In-Game BTC and Airdrop Boxes Follow the instructions to earn points. The more points you earn, the more chances you have to win prizes! ‼️ Make sure your #Twitter account has a profile photo, otherwise it will be flagged as a spam. Deadline: December 20, 00:00 (UTC+8） #TON#Bombie#Gleam#airdrop
@geniusairdropsss · Post #440 · 18.08.2023 г., 09:36
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@geniusairdropsss · Post #472 · 27.10.2023 г., 12:40
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@geniusairdropsss · Post #457 · 24.09.2023 г., 08:50
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@airdropp_io · Post #461 · 22.01.2024 г., 06:26
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@geniusairdropsss · Post #526 · 02.05.2024 г., 10:32
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