@mndsingapore · Post #654 · 14.08.2024 г., 01:01
‼️New stickers alert🚨 Click on the sticker below to start using our new #MNDTalkofTheTown stickers~
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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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Пребарај: #mndtalkofthetown
@mndsingapore · Post #654 · 14.08.2024 г., 01:01
‼️New stickers alert🚨 Click on the sticker below to start using our new #MNDTalkofTheTown stickers~
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@mndsingapore · Post #649 · 06.08.2024 г., 04:02
#MNDTalkOfTheTown: Let’s plan the future of Singapore together with the Draft Master Plan 2025 (DMP 2025) 🗺️ All Singaporeans are welcomed to share their thoughts and ideas for the DMP 2025, co-creating Singapore’s land use plans for the next 10-15 years based on 4 key themes: ⭐️ Shaping a Happy Healthy City ⭐️ Enabling Sustainable Growth ⭐️ Strengthening Urban Resilience ⭐️ Stewarding Our Nature and Heritage More exciting updates will be coming your way. Stay tuned to #TalkofTheTown for updates!
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@mndsingapore · Post #644 · 26.07.2024 г., 10:03
#MNDTalkOfTheTown: HDB has adopted precast technology for improved productivity and quality 🏗️ With precast technology, building components can be manufactured off-site before being delivered and assembled on-site. The precast components include: - Household Shelters - Staircases - Walls - Refuse Chute - Air-Con Ledge Stay tuned for the next part of our series where we introduce Singapore’s land-use plans for the future. #TalkOfTheTown
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@mndsingapore · Post #639 · 03.07.2024 г., 09:04
#MNDTalkOfTheTown: Introducing the BudgetMealGoWhere platform, where you can find cheap and good meals in Singapore 😋 Here’s how you can find your favourite meals on a budget: - Enter a postal code on https://gowhere.gov.sg/budgetmeal/ to find your nearest coffeeshop - Look out for stalls with the Budget Meal sticker Keep a lookout for the next part of our series to find out how we’re improving productivity at construction sites. #TalkOfTheTown
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@mndsingapore · Post #565 · 20.02.2024 г., 09:31
#MNDTalkOfTheTown: Playgrounds have come a long way since the 1960s. Here are some fun facts about these fun spaces: 💪 Playgrounds today are designed to help develop children’s motor skills, like climbing and balancing. 🌈 They are also themed to encourage children to stretch their imaginations and play pretend. 👨👩👧👦 Many are intentionally placed near fitness corners to allow families to come together and bond. 📖 Some of the thematic playgrounds even reflect the history and heritage of the towns. Even more exciting developments are unfolding in your neighbourhoods. Stay tuned to #TalkofTheTown for updates!
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@mndsingapore · Post #560 · 13.02.2024 г., 09:30
#MNDTalkOfTheTown: In the second part of our series, we learn more about the developing🏗️ Jurong Lake District (JLD). JLD’s infrastructure is designed with sustainability in mind. Some of the green initiatives are: ☀️Solar panels on all suitable surfaces. 💨District Cooling System to cool down buildings and the streets more effectively. 🚘EV charging points placed throughout the district. Keep a lookout for the next part of the series as we talk about the evolution of our playgrounds. #TalkOfTheTown
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@mndsingapore · Post #555 · 06.02.2024 г., 09:31
#MNDTalkOfTheTown: Let’s explore how technology has transformed the management of our trees! 🌳 With the help of Light Detection and Ranging (LiDAR) technology and advanced modelling tools like the Tree Structural Model (TSM), we can now accurately assess which trees need our attention – keeping our parks and neighbourhoods a safer place for all. Stay tuned to this series for more about how tech and innovation has transformed the way we work, play and live! #TalkOfTheTown
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@mndsingapore · Post #682 · 26.08.2024 г., 04:02
#MNDTalkOfTheTown: Let’s find out how Project ADORE has helped more dogs to find their forever homes ❤️ Under Project ADORE, led by NParks, HDB flat owners can adopt local mixed-breed dogs of up to 55 cm in height, with proper safeguards in place. The project has even been expanded to allow for the rehoming of retired sniffer dogs too! 🐶 #TalkOfTheTown#projectADORE