mopidy-smartplaylists/mopidy_smartplaylists/__init__.py

from mopidy import config, ext
__version__ = pkg_resources.get_distribution("Mopidy-SmartPlaylists").version

class Extension(ext.Extension):
    dist_name = "Mopidy-SmartPlaylists"
    ext_name = "smartplaylists"
    version = __version__

    def get_default_config(self):
        return config.read(pathlib.Path(__file__).parent / "ext.conf")

    def get_config_schema(self):
        schema = super().get_config_schema()
        schema["genres"] = config.String()
        schema["max_tracks"] = config.Integer()
        return schema

    def setup(self, registry):
        from .backend import SmartPlaylistsBackend
        registry.add("backend", SmartPlaylistsBackend)