ConfZ and MyPy

ConfZ heavily relies on Metaclasses for its lazy loading and singleton design. Unfortunately, MyPy has limited support for them so far (see docs). Thus, it is likely that you will get an error similar to this:

Metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases

So far, the only solution is to ignore these errors:

class MyConfig(BaseConfig):  # type: ignore
    my_variable: bool

Future versions of MyPy might be able to correctly check ConfZ classes.