What order of reading configuration values?

Question

For the python program I am writing I would like to give the opportunity of configuring it in three different ways. Environment variables, configuration files and command line a

Answer 1

AWS CLI is in line with the accepted answer:

Precedence of options:

• If you specify an option by using one of the environment variables described in this topic, it overrides any value loaded from a profile in the configuration file.

• If you specify an option by using a parameter on the CLI command line, it overrides any value from either the corresponding environment variable or a profile in the configuration file.