TGINSIGHT SIMILAR POSTS
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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Пребарај: #tapcoins
@blumgap · Post #3133 · 16.07.2025 г., 04:14
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@blumgap · Post #3087 · 14.07.2025 г., 03:48
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@blumgap · Post #3068 · 13.07.2025 г., 02:53
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@blumgap · Post #3060 · 12.07.2025 г., 17:23
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@blumgap · Post #3015 · 10.07.2025 г., 11:53
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@blumgap · Post #2996 · 09.07.2025 г., 07:43
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@blumgap · Post #2978 · 08.07.2025 г., 08:15
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@blumgap · Post #2958 · 07.07.2025 г., 08:55
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@blumgap · Post #2940 · 06.07.2025 г., 09:18
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@blumgap · Post #2921 · 05.07.2025 г., 06:16
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@blumgap · Post #2893 · 04.07.2025 г., 04:10
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@blumgap · Post #2884 · 03.07.2025 г., 11:21
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