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
Top 10 Benefits of Peanuts 🥜
(Groundnut or Mungfali)
1. Good for healthy Brain(Omega 3 & 6 fatty acids)
2. Protects from Heart disease
3. Fights Stomach Cancer
4. Good for healthy Hair Growth
5. Reduces bad Cholesterol
6. Fights against Depression
7. Good for healthy & Glowing Skin
8. Fights free-radicals (Anti-inflammatory)
9. Rich in Proteins & Fats(good)
10. Contains ample fiber
Nutrients available : Proteins, Vit. E, Minerals like Potassium, Magnesium, Phosphorus, Sodium & Zinc. Omega 3 & 6 fatty acids.
Nutritional Value per 100g
Calories : 567kcal
Protein : 26gm
Fats : 49gm
Bottom line : There's no reason not to munch on this cheaply available yet full of nutrition, crunchy & nutty peanuts. It's a boon for optimum health & wellness.
#foods
🚨Source : @HeathSafetyTps
Herbal Tea
Herbal tea is a decoction or infusion of herbs & spices.
There is a herbal tea for everything. Green tea is a great energy-boosting alternative to coffee, chamomile helps you go to sleep, fennel & peppermint teas aid digestion. Others are ginger, tulsi, even pepper & cinnamon, all extremely healthy.
So, make a good habit of drinking herbal teas.
#foods
⚠️ Also look at: Benefits of GINGER TEA
🚨Source: @HeathSafetyTps
Ginkgo Biloba - 🧠 herb
It's a leaf of the ginkgo tree, which is native to China & one of the oldest plants on the planet, having potential to treat Alzheimer's disease & age-related mental decline.
It's believed that it works by thinning the blood & thereby improving oxygen flow to the brain. The brain is a glutton for oxygen, so it's possible that even a slight lack of circulation can affect its performance.
Gingko improves both attention & memory, but as a brain booster for people with normal mental abilities, it remains controversial.
#foods
🚨Source: @HeathSafetyTps
Diet tips for Gum Health
What a person eats can directly affect the health of their teeth & gums. The foods that should be incorporated in your diet:
1. High-fiber fruits & vegetables, as these can help clean up the mouth, especially Apple🍎 & Ginger
2. Black & Green teas, which help reduce bacteria
3. Dairy products (such as milk, cheese, & yogurt) , as these foods help increase saliva production
4. Foods that contain fluoride, which include water & some poultry & seafood products
5. Sugar-free gum, as chewing it will increase saliva production
It's best to avoid these foods & beverages:
1. Alcohol , as it can dry out the mouth
2. Starchy foods that become stuck in the teeth
3. Sticky candies & sweets
4. Carbonated soft drinks that contain phosphoric & citric acids as well as sugar
#foods
🚨Source : @HeathSafetyTps
HEALTH TIPS:
Liver Detox Juice
Whenever you've a big night out or a heavy cheat meal, you can try a big juice full of fruit & vegetables with liver loving nutrients.
Relish this simple liver cleansing juice...
1 large carrot
1 beetroot
1 green apple
2 cups kale or spinach
1 grapefruit or orange
1 knob of ginger
1/2 cup water
Clean the fruit & vegetables before juicing.
Dilute with half a cup of water or add ice to your juice.
#foods
Source: @HeathSafetyTps
HEALTH TIPS:
Ginkgo Biloba - 🧠 herb
It's a leaf of the ginkgo tree, which is native to China & one of the oldest plants on the planet, having potential to treat Alzheimer's disease & age-related mental decline.
It's believed that it works by thinning the blood & thereby improving oxygen flow to the brain. The brain is a glutton for oxygen, so it's possible that even a slight lack of circulation can affect its performance.
Gingko improves both attention & memory, but as a brain booster for people with normal mental abilities, it remains controversial.
#foods
Join our community today @HeathSafetyTps
Please share now
Diet tips for Healthy Gum
What a person eats can directly affect the health of their teeth & gums. The foods that should be incorporated in your diet:
1. High-fiber fruits & vegetables, as these can help clean up the mouth, especially Apple🍎 & Ginger
2. Black & Green teas, which help reduce bacteria
3. Dairy products (such as milk, cheese, & yogurt) , as these foods help increase saliva production
4. Foods that contain fluoride, which include water & some poultry & seafood products
5. Sugar-free gum, as chewing it will increase saliva production
It's best to avoid these foods & beverages:
1. Alcohol , as it can dry out the mouth
2. Starchy foods that become stuck in the teeth
3. Sticky candies & sweets
4. Carbonated soft drinks that contain phosphoric & citric acids as well as sugar
#foods
Join 👉🏻@HealthSafetyTips