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
【Promoted】
🌟Best FREE PC Games This Week🌟
Upgrade your gaming nights without spending a cent 💻💰 These FREE PC games are trending right now!
🔻Editor’s Weekly Free Picks🔻
1. Hollow Knight
📥Download Free Now📥
2. GTA San Andreas - The Definitive Edition
📥Download Free Now📥
3. GTA Vice City - The Definitive Edition
📥Download Free Now📥
4. Naruto Shippuden: Ultimate Ninja Storm 4
📥Download Free Now📥
5. Palworld
📥Download Free Now📥
6. Need for Speed: Heat
📥Download Free Now📥
7. Sultan's Game
📥Download Free Now📥
8. The Last of Us Part II
📥Download Free Now📥
9. Elden Ring
📥Download Free Now📥
10. Shawarma Legend
📥Download Free Now📥
📢 Be the first to know ➺ follow PC Games Free Download & PC Games Free Download Chat Group and never miss a drop! 🚀
#FreeGames#PCGaming#FreeDownload
【Promoted】
⚡Weekly FREE PC Gaming Drops⚡
Ready for something new? 🕹️ Check out our latest roundup of FREE PC games you can download and play right away! 📥
🔻Fresh Free Game Finds🔻
1. FIFA23
📥Download Free Now📥
2. Five Hearts Under One Roof
📥Download Free Now📥
3. GTA Vice City - The Definitive Edition
📥Download Free Now📥
4. GTA San Andreas - The Definitive Edition
📥Download Free Now📥
5. Forza Horizon 5
📥Download Free Now📥
6. GTA III - The Definitive Edition
📥Download Free Now📥
7. Shawarma Legend
📥Download Free Now📥
8. AI.Limit
📥Download Free Now📥
9. Naruto Shippuden: Ultimate Ninja Storm 4
📥Download Free Now📥
10. Need for Speed: Heat
📥Download Free Now📥
👥 Join the fun ➺ connect via PC Games Free Download & PC Games Free Download Chat Group for daily recommendations! 🔔
#FreeGames#PCGaming#FreeDownload
【Promoted】
🔥FREE PC Games Worth Your Time🔥
Tired of paid games? 😴 Discover amazing FREE PC titles selected by gamers, for gamers 🎲
🔻Community Favorite Free Games🔻
1. GTA San Andreas - The Definitive Edition
📥Download Free Now📥
2. GTA Vice City - The Definitive Edition
📥Download Free Now📥
3. TEKKEN 8
📥Download Free Now📥
4. DRAGON BALL: Sparking! ZERO
📥Download Free Now📥
5. Naruto Shippuden: Ultimate Ninja Storm 4
📥Download Free Now📥
6. Sekiro: Shadows Die Twice
📥Download Free Now📥
7. Cyberpunk 2077: Phantom Liberty
📥Download Free Now📥
8. Shadow of the Tomb Raider
📥Download Free Now📥
9. Need for Speed: Heat
📥Download Free Now📥
10. Marvel’s Spider-Man Remastered
📥Download Free Now📥
💡 Don’t miss out ➺ join PC Games Free Download & PC Games Free Download Chat Group to stay updated! 🧩
#FreeGames#PCGaming#FreeDownload
【Promoted】
🌟Best FREE PC Games This Week🌟
Upgrade your gaming nights without spending a cent 💻💰 These FREE PC games are trending right now!
🔻Editor’s Weekly Free Picks🔻
1. FIFA23
📥Download Free Now📥
2. GTA Vice City - The Definitive Edition
📥Download Free Now📥
3. GTA San Andreas - The Definitive Edition
📥Download Free Now📥
4. Stray
📥Download Free Now📥
5. Need for Speed: Heat
📥Download Free Now📥
6. Hollow Knight
📥Download Free Now📥
7. TEKKEN 8
📥Download Free Now📥
8. DRAGON BALL: Sparking! ZERO
📥Download Free Now📥
9. Monument Valley
📥Download Free Now📥
10. Palworld
📥Download Free Now📥
📢 Be the first to know ➺ follow PC Games Free Download & PC Games Free Download Chat Group and never miss a drop! 🚀
#FreeGames#PCGaming#FreeDownload
【Promoted】
🌟Best FREE PC Games This Week🌟
Upgrade your gaming nights without spending a cent 💻💰 These FREE PC games are trending right now!
🔻Editor’s Weekly Free Picks🔻
1. GTA Vice City - The Definitive Edition
📥Download Free Now📥
2. GTA San Andreas - The Definitive Edition
📥Download Free Now📥
3. Marvel’s Spider-Man: Miles Morales
📥FREE download now📥
4. Marvel’s Spider-Man Remastered
📥Download Free Now📥
5. Shadow of the Tomb Raider
📥FREE download now📥
6. Need for Speed: Heat
📥Download Free Now📥
7. DRAGON BALL: Sparking! ZERO
📥Download Free Now📥
8. Monument Valley
📥Download Free Now📥
9. Naruto Shippuden: Ultimate Ninja Storm 4
📥Download Free Now📥
10. Sekiro: Shadows Die Twice
📥FREE download now📥
📢 Be the first to know ➺ follow PC Games Free Download & PC Games Free Download Chat Group and never miss a drop! 🚀
#FreeGames#PCGaming#FreeDownload
【Promoted】
🔥Top 10 Must-Play FREE PC Games of the Week🔥
Ready to level up your gaming library without spending a dime? 🕹️ Check out our curated picks for the best FREE PC games you can play right now! 🆓
🔻Unmissable PC Game Picks🔻
1. FIFA23
📥Download Free Now📥
2. Marvel’s Spider-Man: Miles Morales
📥Download Free Now📥
3. Palworld
📥Download Free Now📥
4. Hollow Knight
📥Download Free Now📥
5. DRAGON BALL: Sparking! ZERO
📥Download Free Now📥
6. Shawarma Legend
📥Download Free Now📥
7. Cyberpunk 2077: Phantom Liberty
📥Download Free Now📥
8. Five Nights at Freddy's: Into the Pit
📥Download Free Now📥
9. GTA San Andreas - The Definitive Edition
📥Download Free Now📥
10. GTA Vice City - The Definitive Edition
📥Download Free Now📥
🎯 Stay ahead of the curve ➺ join the PC Games Free Download & PC Games Free Download Chat Group to connect with other gamers! 🗨️
#FreeGames#PCGaming#FreeDownload
【Promoted】
🔥Weekly FREE PC Game Recommendations🔥
Hunting for new adventures on your PC? 🖥️ Explore our latest roundup of the top FREE games you shouldn’t miss this week! 🎲
🔻Top Free Game Finds🔻
1. GTA San Andreas - The Definitive Edition
📥Download Free Now📥
2. GTA Vice City - The Definitive Edition
📥Download Free Now📥
3. GTA III - The Definitive Edition
📥Download Free Now📥
4. Marvel’s Spider-Man Remastered
📥Download Free Now📥
5. Marvel’s Spider-Man: Miles Morales
📥Download Free Now📥
6. Naruto Shippuden: Ultimate Ninja Storm 4
📥Download Free Now📥
7. FIFA23
📥Download Free Now📥
8. Forza Horizon 5
📥Download Free Now📥
9. Shawarma Legend
📥Download Free Now📥
10. DRAGON BALL: Sparking! ZERO
📥Download Free Now📥
👾 Get in on the action ➺ join the PC Games Free Download & PC Games Free Download Chat Group for more recommendations! 🤝
#FreeGames#PCGaming#FreeDownload
【Promoted】
💥Hot FREE PC Games You Need to Try Now!💥
Craving new games? Our team has picked the hottest FREE PC games you can enjoy this week-no wallet needed! 🕹️🆓
🔻Weekly Free Game Highlights🔻
1. Hollow Knight
📥Download Free Now📥
2. GTA San Andreas - The Definitive Edition
📥Download Free Now📥
3. Marvel’s Spider-Man Remastered
📥Download Free Now📥
4. GTA Vice City - The Definitive Edition
📥Download Free Now📥
5. FIFA23
📥Download Free Now📥
6. Stray
📥Download Free Now📥
7. TEKKEN 8
📥Download Free Now📥
8. Palworld
📥Download Free Now📥
9. Cyberpunk 2077: Phantom Liberty
📥Download Free Now📥
10. The Last of Us Part II
📥Download Free Now📥
🔥 Don’t miss a beat ➺ join PC Games Free Download & PC Games Free Download Chat Group to swap tips and chat with fellow fans! 🗣️
#FreeGames#PCGaming#FreeDownload
【Promoted】
💥Best FREE PC Games to Download This Week💥
Looking for fresh gaming thrills without breaking the bank? 💻 Discover our selection of the week’s top FREE PC games and start playing instantly! 🆓
🔻Editor's Choice Free Games🔻
1. Monument Valley
📥Download Free Now📥
2. GTA Vice City - The Definitive Edition
📥Download Free Now📥
3. GTA San Andreas - The Definitive Edition
📥Download Free Now📥
4. Elden Ring
📥Download Free Now📥
5. Far Cry 6
📥Download Free Now📥
6. FIFA23
📥Download Free Now📥
7. TEKKEN 8
📥Download Free Now📥
8. Baldur's Gate 3
📥Download Free Now📥
9. Need for Speed: Heat
📥Download Free Now📥
10. GTA III - The Definitive Edition
📥Download Free Now📥
⚡ Join the community ➺ follow PC Games Free Download & PC Games Free Download Chat Group for tips and game chats! 💬
#FreeGames#PCGaming#FreeDownload
【Promoted】
🔥Weekly FREE PC Game Recommendations🔥
Hunting for new adventures on your PC? 🖥️ Explore our latest roundup of the top FREE games you shouldn’t miss this week! 🎲
🔻Top Free Game Finds🔻
1. Cyberpunk 2077: Phantom Liberty
📥Download Free Now📥
2. GTA Vice City - The Definitive Edition
📥Download Free Now📥
3. GTA San Andreas - The Definitive Edition
📥Download Free Now📥
4. FIFA23
📥Download Free Now📥
5. DRAGON BALL: Sparking! ZERO
📥Download Free Now📥
6. Forza Horizon 5
📥Download Free Now📥
7. Naruto Shippuden: Ultimate Ninja Storm 4
📥Download Free Now📥
8. Marvel’s Spider-Man Remastered
📥Download Free Now📥
9. Stray
📥Download Free Now📥
10. Palworld
📥Download Free Now📥
👾 Get in on the action ➺ join the PC Games Free Download & PC Games Free Download Chat Group for more recommendations! 🤝
#FreeGames#PCGaming#FreeDownload
【Promoted】
🔥Top 10 Must-Play FREE PC Games of the Week🔥
Ready to level up your gaming library without spending a dime? 🕹️ Check out our curated picks for the best FREE PC games you can play right now! 🆓
🔻Unmissable PC Game Picks🔻
1. Ultimate Fishing Simulator
📥Download Free Now📥
2. Devil May Cry 5
📥Download Free Now📥
3. Sekiro: Shadows Die Twice
📥Download Free Now📥
4. Palworld
📥Download Free Now📥
5. Marvel’s Spider-Man Remastered
📥Download Free Now📥
6. FIFA23
📥Download Free Now📥
7. Five Hearts Under One Roof
📥Download Free Now📥
8. Shawarma Legend
📥Download Free Now📥
9. GTA San Andreas - The Definitive Edition
📥Download Free Now📥
10. GTA Vice City - The Definitive Edition
📥Download Free Now📥
🎯 Stay ahead of the curve ➺ join the PC Games Free Download & PC Games Free Download Chat Group to connect with other gamers! 🗨️
#FreeGames#PCGaming#FreeDownload
【Promoted】
💥Best FREE PC Games to Download This Week💥
Looking for fresh gaming thrills without breaking the bank? 💻 Discover our selection of the week’s top FREE PC games and start playing instantly! 🆓
🔻Editor's Choice Free Games🔻
1. FIFA23
📥Download Free Now📥
2. Five Nights at Freddy's: Into the Pit
📥Download Free Now📥
3. GTA Vice City - The Definitive Edition
📥Download Free Now📥
4. GTA San Andreas - The Definitive Edition
📥Download Free Now📥
5. Forza Horizon 5
📥Download Free Now📥
6. GTA III - The Definitive Edition
📥Download Free Now📥
7. Cyberpunk 2077: Phantom Liberty
📥Download Free Now📥
8. TEKKEN 8
📥Download Free Now📥
9. Far Cry 6
📥Download Free Now📥
10. Cities: Skylines II
📥Download Free Now📥
⚡ Join the community ➺ follow PC Games Free Download & PC Games Free Download Chat Group for tips and game chats! 💬
#FreeGames#PCGaming#FreeDownload