[Python] Creating a singleton in a base class for it's derivative classes

[Wolfmyths]

Our config managers which are in charge of reading/writing data are singleton classes.

Here's an example what makes them a singleton.

def __new__(cls) -> Self:

    if not hasattr(cls, 'instance'):

        cls.instance = super(ProfileManager, cls).__new__(cls)

    return cls.instance

What I want is the base class Config to have this feature so there is less repeated code.

This issue takes place in save.py