How to access environment variable values?

Question

How can I access the environment variable values in my python application?

Answer 1

Through os.environ, our enivronment variables are accessed

import os

print(os.environ['HOME'])

If you want to see all the environment variables, just use:

os.environ

Want to complete list:

# using get will return `None` if a key is not present rather than raise a `KeyError`

print(os.environ.get('KEY_THAT_MIGHT_EXIST'))

# os.getenv is equivalent, and can also give a default value instead of `None`

print(os.getenv('KEY_THAT_MIGHT_EXIST', default_value))

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