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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@english_bbc_learning · Post #3748 · 05.11.2025 г., 18:01
🤔 What phrases do you know with 🐶 ‘dog’? 🤩 We’re here to help you learn 7 phrases so you can feel like ‘a top dog’! Scroll through the images – and ✍️ write some sample sentences of your own! 🥹 Researchers from Japan say dogs could cry happy tears when they see their owners. 😊 Learn more about this story by clicking on the link in our bio! Images: Getty #learnenglish#idiom#vocabulary#englishclass#IELTS
@english_bbc_learning · Post #3810 · 17.12.2025 г., 07:53
Are you a helpful person? 💪😊 Help us out by writing the missing word in this expression which means ‘If a lot of people help, a task can be completed quickly and easily’. Are you happy to help when you’re needed? 👇👇👇 MORE: Click the link in our bio to learn another expression with 'hand' that you can use in similar situations! 👋👋👋 Image: Getty #learnenglish#vocabulary#englishclass#phrases#expressions#idiom#learnenglish
@english_bbc_learning · Post #3804 · 14.12.2025 г., 07:15
Do you know someone who always thinks that everyone else has a better life than them?! 🙄😅 Scroll through the images to find out how to use ‘the grass is always greener on the other side’ 🌱, and don’t forget to answer the questions on the last slide! EXTRA: Could walking 7,000 steps a day could improve your mental health? 🚶 Click the link in our bio to find out and learn some useful vocabulary in the process! 📰💚 Image: Getty #vocabulary#learnenglish#englishlanguage#expression#idiom#proverb#englishclass#speakenglish
@english_bbc_learning · Post #3776 · 29.11.2025 г., 10:17
You know when somebody just WON’T change their ways? 😠 We’ve got an English expression for that! ✅ Scroll through the images to find out how to use ‘You can’t teach an old dog new tricks.’ ❌🐶 Can you use it in a sentence – and do you have a similar expression in your language? 👇👇👇 MORE: If you'd like to learn some more animal idioms, like 'rabbit on 🐰' or 'as sick as a parrot 🦜', click the link in our bio! Image: Getty #trick#proverb#learnenglish#vocabulary#learnenglish#englishlanguage#expression#idiom#englishclass#speakenglish
@english_bbc_learning · Post #3821 · 23.12.2025 г., 13:20
What you do is more important than what you say, right? 👍 Can you complete this English expression that means exactly that? Write your answer in the comments and don’t forget to give this post a like! Do you have a similar expression in your language? 👇👇👇 Want to learn more English expressions and idioms? Click the link in our bio to listen to our podcast The English We Speak! Image: Getty #learnenglish#esl#efl#vocabulary#englishclass#phrases#expressions#idiom#learnenglish#britishenglish#informalenglish#slang
@english_bbc_learning · Post #3720 · 10.10.2025 г., 15:34
😃Even if nobody in your family is called Bob, you can still use this informal English expression to say that a task is really simple and easy! Write your answer in the comments and be sure to like this post! Do you have a similar expression in your language? 👇👇👇 🤩 MORE: Learn about the stories behind our names with this episode of ⏱️ 6 Minute English. Click the link in our bio NOW! #idioms#esl#efl#vocabulary#englishclass#phrases#expressions#idiom#learnenglish#britishenglish#informalenglish#slang
@english_bbc_learning · Post #3842 · 31.12.2025 г., 16:03
It’s almost New Year – and we’ve got a great expression you can use to say that ‘things will be different from now on!’ 🎉🥳 Choose the correct word to fill the gap – we’ll tell you the answer later! MORE: Click the link in our bio to see what our presenter's hopes, plans and dreams for 2025 were! 😄 Image: Getty #learnenglish#newyear#happynewyear#freshstart#newbeginning#vocabulary#englishclass#phrases#expressions#idiom#learnenglish#britishenglish#informalenglish#slang
@english_bbc_learning · Post #3724 · 17.10.2025 г., 12:23
🤩 Even if you don’t eat meat, you can still use this expression to say that you’re super-hungry! 😁 Write your answer in the comments and like and share this post! Do you have a similar expression in your language? 👇👇🤩 MORE: ⁉️Are you angry when you're hungry? There's an English expression for that! 😲 Click the link in our bio to find out what it is with ⏱️ 6 Minute English! Images: Getty #learnenglish#hungry#starving#horse#esl#efl#vocabulary#englishclass#phrases#expressions#idiom#learnenglish#britishenglish#informalenglish#slang
@english_bbc_learning · Post #3658 · 15.07.2025 г., 18:29
🤔 Did something bad happen to you when you weren’t expecting it? You’re not going to put yourself in that situation again, are you? 😄 Learn this useful English expression that summarises this life lesson. Give this post a like, and ✍️ put your answer in the comments! Do you have a similar expression in your language? 🤩 Click on the link in our bio to learn some modern idioms! Images: Getty #learnenglish#advice#idioms#esl#efl#vocabulary#englishclass#phrases#expressions#oncebitten#britishenglish#lifelesson#inspiration#slang