Fixed error: homepage/admin.py list_filter values must be a list

homepage/admin.py

@@ -4,21 +4,21 @@ from .models import Artist, Album, Song
 
 class ArtistAdmin(admin.ModelAdmin):
     model = Artist
-    list_display = ('artist_name', 'birth_name', 'monthly_listeners')
-    search_fields = ('artist_name', 'birth_name')
-    list_filter = ('artist_name', 'birth_name')
+    list_display = ('artist_name', 'birth_name', 'monthly_listeners',)
+    search_fields = ('artist_name', 'birth_name',)
+    list_filter = ('artist_name', 'birth_name',)
 
 class AlbumAdmin(admin.ModelAdmin):
     model = Album
-    list_display = ('album_name', 'description', 'release_date', 'label', 'song_count')
-    search_fields = ('album_name', 'description', 'label')
-    list_filter = ('album_name')
+    list_display = ('album_name', 'description', 'release_date', 'label', 'song_count',)
+    search_fields = ('album_name', 'description', 'label',)
+    list_filter = ('album_name',)
 
 class SongAdmin(admin.ModelAdmin):
     model = Song
-    list_display = ('song_title', 'song_length', 'lyrics', 'music_video')
-    search_fields = ('song_title', 'lyrics')
-    list_filter = ('song_title')
+    list_display = ('song_title', 'song_length', 'lyrics', 'music_video',)
+    search_fields = ('song_title', 'lyrics',)
+    list_filter = ('song_title',)
 
 admin.site.register(Artist, ArtistAdmin)
 admin.site.register(Album, AlbumAdmin)