use reduce() from functools

beets/autotag/match.py

@@ -29,6 +29,7 @@ from beets import config
 from beets.util import plurality
 from beets.autotag import hooks
 from beets.util.enumeration import OrderedEnum
+from functools import reduce
 
 # Artist signals that indicate "various artists". These are used at the
 # album level to determine whether a given release is likely a VA

beets/dbcore/query.py

@@ -22,6 +22,7 @@ from operator import mul
 from beets import util
 from datetime import datetime, timedelta
 import unicodedata
+from functools import reduce
 
 
 class ParsingError(ValueError):

beetsplug/acousticbrainz.py

@@ -21,6 +21,7 @@ import requests
 import operator
 
 from beets import plugins, ui
+from functools import reduce
 
 ACOUSTIC_BASE = "https://acousticbrainz.org/"
 LEVELS = ["/low-level", "/high-level"]