Add trace level to the logger

[mpd-sima.git] / sima / client.py

diff --git a/sima/client.py b/sima/client.py
index f64277e8f1bd21b2325d62a654dbe74362a73d08..e171c0b1d6c1934d728470e649b06c104e486992 100644 (file)
--- a/sima/client.py
+++ b/sima/client.py
@@ -159,8 +159,8 @@ class PlayerClient(Player):
         else:
             self.log.info('Player: Initialising cache!')
         self._cache = {
-                'artists': None,
-                'nombid_artists': None,
+                'artists': frozenset(),
+                'nombid_artists': frozenset(),
                 }
         self._cache['artists'] = frozenset(self._execute('list', ['artist']))
         if Artist.use_mbid: