envvarconf

Safe app configuration from environment variables without extra dependencies

Install

pip install envvarconf

Example

Define our settings

from envvarconf import BaseSettings
from envvarconf.loaders import environ


class Settings(BaseSettings):
    SENTRY_DSN: str
    LOGGING_LEVEL: str = 'debug'

    HOST: str = "aaaakehgeiuhgiweurhiuerhf"*200
    PORT: int


if __name__ == "__main__":
    settings = Settings()
    settings.load(loader=environ.Loader())

    print("OK!")
    print(settings)

Run application without any environment definition

$ python3 main.py
There is errors in settings
 * SENTRY_DSN is not defined
 * PORT is not defined

Application settings:
SENTRY_DSN: <class 'str'> = NOT DEFINED!
LOGGING_LEVEL: <class 'str'> = debug
HOST: <class 'str'> = aaaakehgeiuhgi...
PORT: <class 'int'> = NOT DEFINED!

Define HOST variable:

$ HOST=1 python3 main.py
There is errors in settings
 * SENTRY_DSN is not defined
 * PORT is not defined

Application settings:
SENTRY_DSN: <class 'str'> = NOT DEFINED!
LOGGING_LEVEL: <class 'str'> = debug
HOST: <class 'str'> = 1
PORT: <class 'int'> = NOT DEFINED!

Define all variables

$ HOST=1 PORT=2 SENTRY_DSN=3 python3 main.py
OK!
<Settings SENTRY_DSN=3, LOGGING_LEVEL=debug, HOST=1, PORT=2>