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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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Пронајдени 17 слични објави

Пребарај: #getvaccinated

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Vaccines are one of the best tools we have to improve health and well-being around the world. #TakeResponsibility, encourage your loved ones and those around you to #GetVaccinated. Visit https://www.vacsitefinder.nphcda.gov.ng/ to locate the nearest vaccination site to you.

📢 Nigerians are advised to continue to #TakeResponsibility. Visit the nearest government health facility to #GetVaccinated if you have not been previously vaccinated. 🔗 Public Health Advisory: https://www.ncdc.gov.ng/news/429/public-health-advisory-following-the-presidential-approval-for-the-relaxation-of-covid-19-safety-measures-%26-travel-advisory @PSCCOVID19 Update: https://covid19.ncdc.gov.ng/media/files/Press_Release_-_Relaxation_of_COVID-19_Rules_Ako_221212_210142.pdf

🚨DIPHTHERIA SITUATION REPORT🚨 As of March 9, 2025 (Epi-Week 10): 📍 23 suspected cases reported in Lagos (20) and Katsina (3) 📍 0 confirmed cases this week 📍 42,642 suspected cases recorded since 2022 across 37 states 📍 25,812 confirmed cases & 1,319 deaths (CFR: 5.1%) 🔹 Most affected states: Kano, Yobe, Katsina, Bauchi, Borno 🔹 62.9% of cases are in children aged 1–14 years 🔹 Only 19.3% of confirmed cases were fully vaccinated 💉 Vaccination is key! Protect yourself and your loved ones. 📞 Report suspected cases via NCDC’s toll-free line: 6232 🔗 Read more: https://ncdc.gov.ng/themes/common/files/sitreps/0a1f4b602a9f655c68b316934e533928.pdf #Diphtheria#GetVaccinated#NCDCNigeria

People most at risk of #diphtheria infection are urged to #GetVaccinated These include: ➡️Children & adults who have not received any dose of the anti-diphtheria vaccine ➡️Healthcare workers & others who have been exposed to suspected/confirmed cases ➡️People who live in areas with poor sanitation #TakeResponsibility to stay safe

Severe disease, admissions and deaths disproportionately affect the unvaccinated and those with risk factors i.e., older people, people with underlying health conditions and the immunocompromised. #GetVaccinated against #COVID19 to stay safe and healthy. #TakeResponsibility

#COVID19 is still a health threat If you are experiencing symptoms associated with #COVID19, visit the nearest testing centre close to you for diagnosis & treatment #GetVaccinated, the vaccine protects you from severe illness, hospitalisation & death #TakeResponsibility

Severe disease, admissions and deaths disproportionately affect the unvaccinated & those with risk factors i.e., older people, people with underlying health conditions and the immunocompromised. #GetVaccinated against #COVID19 to stay safe and healthy. #TakeResponsibility

Getting vaccinated protects you from severe illness, hospitalisation & death from the #COVID19 virus. #TakeResponsibility, encourage your loved ones and those around you to #GetVaccinated. Visit https://www.vacsitefinder.nphcda.gov.ng/ to locate the nearest vaccination site to you.

Elderly persons & those with existing medical conditions are encouraged to take extra precautions to stay safe & healthy. 💉#GetVaccinated to limit your risk of getting infected with #COVID19. Vaccination sites: https://nphcda.vaccination.gov.ng/vaccination-sites #TakeResponsibility

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