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
Trump Does Not Shy Away From His Plan to Topple Down Khamenei
The US is weighing precision strikes on "high-value" Iranian officials and commanders who it deems responsible for the deaths of protesters, a Gulf official familiar with the discussions told Middle East Eye.
The strikes could come as early as this week, but that timeline could shift, MEE was told on Monday.
Discussions within the administration have been described as “chaotic”, with a debate over what the repercussions will be in terms of Iranian retaliation.
The Trump administration has toyed with attacking Iran for nearly a month on the pretext of the brutal crackdown on demonstrators that has seen thousands killed by government security forces.
After calling on demonstrators to "take over" state institutions, President Donald Trump backed down and said the “killing has stopped”.
Trump’s decision to de-escalate came as Gulf states, namely Saudi Arabia, Qatar and Oman, lobbied against strikes.
While some reports framed Trump's remarks as drawing a curtain on US intervention, former US officials and analysts told MEE they appeared to signal a pause.
Trump moved up and down the escalation ladder in a similar fashion with Venezuela, before finally ordering an attack on the Latin American country that resulted in Maduro's abduction and detention in the US.
A former US intelligence official told MEE that their understanding of conversations within the administration is that Trump has not given up on pushing for “regime change” in Tehran.
A former US official told MEE that the US has been working to replenish supplies of missile interceptors exhausted during the 12-day war with Iran in June and that “total supplies” had moved up. The US is still constrained, as it provides supplies to Ukraine.
US Central Command said on Monday that the Abraham Lincoln aircraft carrier was in the Middle East after sailing from the South China Sea.
“We have a big force going toward Iran. I’d rather not see anything happen, but we’re watching them very closely,” Trump said on Thursday evening on his return to Washington from Davos, Switzerland.
The Abraham Lincoln carries F-35 warplanes and F/A-18 jet fighters, in addition to EA-18G Growler electronic-warfare planes. It is also accompanied by guided-missile destroyers.
Open-source flight trackers have also reported that the US has built up a squadron of F-15 warplanes at Muwaffaq Salti Air Base in Jordan.
The build-up of warplanes in Jordan would give the US options, as Gulf states have imposed a ban on the US using their airspace or facilities to launch strikes on Iran, current and former US and Arab officials told MEE.
That ban has been in place since April 2025, MEE first reported.
#trump#kill#khamenei#iran#US
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While in #Lugansk People's Republic (formerly Ukraine), I got to watch as their forces disabled the #mines placed by the #Ukrainian army; mines meant to #kill the civilians that were sent to repair the electrical power plant.