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Изворен канал @pythonotes · Post #201 · 13 јан.

Мы уже знаем, что на текущую сессию интерпретатора изменение PYTHONPATH никак не повлияет. Но если вы запустите дочерний процесс, то он унаследует окружение текущего процесса, а значит и изменения в любых переменных будут на него влиять. Вот небольшой пример: Объявляем переменную user@host:~$ export PYTHONPATH=/path1 Запускаем интерпретатор user@host:~$ python3 Проверим что в sys.path >>> import sys >>> print(sys.path) ['', '/path1', '/usr/lib/...', ...] Добавляем что-то в переменную >>> import os >>> os.emviron['PYTHONPATH'] = '/path1:/path2' >>> print(sys.path) ['', '/path1', '/usr/lib/...', ...] Изменений нет. Но давайте запустим дочерний процесс и посмотрим там >>> os.system('python3') # теперь мы находимся в другом процессе >>> import sys >>> print(sys.path) ['', '/path1', '/path2', '/usr/lib/...', ...] Тоже самое будет и с subprocess, так как по умолчанию текущее окружение тоже наследуется. >>> import subprocess >>> subprocess.call(['python3', '-c', 'import sys;print(sys.path)']) ['', '/path1', '/path2', '/usr/lib/...', ...] ______________________ Лучшей практикой является передача энвайронмента явно через аргумент env! import subprocess subprocess.call(cmd, env={'PYTHONPATH': '...'}) Это поможет точно понимать какое окружение будет у запускаемого процесса и при этом не изменять окружение текущего процесса. #basic

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STEM Arena

@stemarena · Post #24 · 12.03.2026 г., 18:18

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Radioactive scientist? Think of a woman.🩻 Let’s talk about the woman, the myth, the legend—Marie Curie. She didn’t just break through ceilings; she melted them with radioactive elements she discovered herself. Born Maria Skłodowska in Warsaw in 1867, Marie faced financial hardship early on. But with a prodigious memory and relentless drive, she moved to Paris to study at the Sorbonne. There, she wasn’t just a student, she connected with top physicists like Jean Perrin and eventually met her scientific partner in crime, Pierre Curie. Their partnership wasn’t just a marriage; it was a research powerhouse. As she was working in the lab, Marie noticed something strange: the mineral pitchblende was more radioactive than pure uranium. How could that happen? Apparently, it contained a tiny amount of some unknown, extremely active element. Pierre joined the hunt, and together they discovered two brand new elements: Polonium (named after her beloved homeland, Poland) and Radium. While Pierre studied the radiation, Marie did the heavy lifting—literally. She isolated pure metallic radium, with a little help from chemist André-Louis Debierne. When World War I erupted, Marie didn’t hide in a lab. She pioneered mobile X-ray units, famously called “Les Petites Curies.” These were ordinary cars fitted with X-ray apparatus and driven right to the front lines. She personally secured funding, trained medics, and helped examine over one million wounded soldiers. She essentially brought X-rays to the battlefield and made them an essential medical tool. …. Swipe through posts to explore the legacy Marie left behind!⚡️ #peopleinstemseries#womeninstem#mariecurie#radioactive#radiumgirls

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