mopidy-smartplaylists/mopidy_smartplaylists/__init__.py

import mopidy

class Extension(mopidy.ext.Extension):
    dist_name = "Mopidy-SmartPlaylists"
    ext_name = "smartplaylists"
    version = "0.1.0"

    def get_default_config(self):
        return """
        [smartplaylists]
        genres = rock,jazz,blues
        max_tracks = 50
        playlist_prefix = [Smart]
        """

    def get_config_schema(self):
        schema = super().get_config_schema()
        # You can add: schema["genres"] = config.String()
        return schema

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