config_loader | common configuration files such as database.yml | Configuration Management library

I'm doing a programming course (CS50W) and it has a command to submit the project to github automatically. It's called submit50. When trying to push my code to github through this method, I do:

submit50 --verbose web50/projects/2020/x/capstone

And I'm getting the following error:

OSError: [Errno 7] Argument list too long: b'/usr/local/bin/git'

I have literally no idea what is happening here. If you could help me out I would be grateful.

Full error with traceback:

I have a yaml file which has the following lines:

I'm trying to create a yaml-driven config module for python that loads both from a flat yaml file, and optionally loads params from sys.argv. It also saves the loaded properties to a local variable (which is ugly, but it's still preferable to parsing the yaml file every time config is referenced).

I have this working, but the way I have to import it seems over-the-top, and not very pythonic. Is there a more elegant way to construct this so that:

• I can use a single import statement
• I can ensure that the config isn't loaded more times (throughout different modules where it's used) than absolutely necessary

Structure:

I know this is something really simple to do but i'm not recalling how should i do it.

Basically, I want the result returned from the function select_data to be like: