Function _remove_class

lib/sqlalchemy/orm/clsregistry.py:119–149

(
    classname: str, cls: Type[Any], decl_class_registry: _ClsRegistryType
)

def _remove_class(
    classname: str, cls: Type[Any], decl_class_registry: _ClsRegistryType
) -> None:
    if classname in decl_class_registry:
        existing = decl_class_registry[classname]
        if isinstance(existing, _MultipleClassMarker):
            existing.remove_item(cls)
        else:
            del decl_class_registry[classname]

    try:
        root_module = cast(
            _ModuleMarker, decl_class_registry["_sa_module_registry"]
        )
    except KeyError:
        return

    tokens = cls.__module__.split(".")

    while tokens:
        token = tokens.pop(0)
        module = root_module.get_module(token)
        for token in tokens:
            module = module.get_module(token)
        try:
            module.remove_class(classname, cls)
        except AttributeError:
            if not isinstance(module, _ModuleMarker):
                pass
            else:
                raise


def _key_is_empty(