Use Abstract Base Class

beets/autotag/__init__.py

@@ -19,7 +19,7 @@
 from __future__ import division, absolute_import, print_function
 
 import re
-from abc import abstractmethod, abstractproperty
+from abc import ABC, abstractmethod, abstractproperty
 
 from beets import logging
 from beets import config
@@ -222,7 +222,7 @@ def get_distance(config, data_source, info):
     return dist
 
 
-class APIAutotaggerPlugin(BeetsPlugin):
+class APIAutotaggerPlugin(ABC):
     def __init__(self):
         super(APIAutotaggerPlugin, self).__init__()
         self.config.add({'source_weight': 0.5})

beetsplug/deezer.py

@@ -26,9 +26,10 @@ import requests
 from beets import ui
 from beets.autotag import APIAutotaggerPlugin
 from beets.autotag.hooks import AlbumInfo, TrackInfo
+from beets.plugins import BeetsPlugin
 
 
-class DeezerPlugin(APIAutotaggerPlugin):
+class DeezerPlugin(APIAutotaggerPlugin, BeetsPlugin):
     data_source = 'Deezer'
 
     # Base URLs for the Deezer API
@@ -36,6 +37,7 @@ class DeezerPlugin(APIAutotaggerPlugin):
     search_url = 'https://api.deezer.com/search/'
     album_url = 'https://api.deezer.com/album/'
     track_url = 'https://api.deezer.com/track/'
+    
     id_regex = {
         'pattern': r'(^|deezer\.com/([a-z]*/)?{}/)([0-9]*)',
         'match_group': 3,

beetsplug/spotify.py

@@ -32,9 +32,10 @@ import confuse
 from beets import ui
 from beets.autotag import APIAutotaggerPlugin
 from beets.autotag.hooks import AlbumInfo, TrackInfo
+from beets.plugins import BeetsPlugin
 
 
-class SpotifyPlugin(APIAutotaggerPlugin):
+class SpotifyPlugin(APIAutotaggerPlugin, BeetsPlugin):
     data_source = 'Spotify'
 
     # Base URLs for the Spotify API