Added commas to the ends of each list_filter entry.

gabigarrero_music/Homepage/admin.py

@@ -6,19 +6,19 @@ 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_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_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_filter = ("song_title",)
     
 admin.site.register(Artist, ArtistAdmin)
 admin.site.register(Album, AlbumAdmin)