X-Git-Url: https://git.kaliko.me/?a=blobdiff_plain;f=sima%2Flib%2Fmeta.py;h=9265c3cddfe6103e36eb80d3203317295fa2aae7;hb=24cc6f0ba625f217d6127fc0cee880b22a8c6cbf;hp=4e481e64ab4bfd5349569ae61e70fe36dc15060b;hpb=78a694ddcd2a6ecc8b2b1fd3c74ee2d938707305;p=mpd-sima.git

diff --git a/sima/lib/meta.py b/sima/lib/meta.py
index 4e481e6..9265c3c 100644
--- a/sima/lib/meta.py
+++ b/sima/lib/meta.py
@@ -22,7 +22,6 @@ Defines some object to handle audio file metadata
 """
 
 from .simastr import SimaStr
-from .track import Track
 
 class MetaException(Exception):
     """Generic Meta Exception"""
@@ -65,8 +64,15 @@ class Meta:
         else:
             return id(self)
 
+    def __bool__(self):  # empty name not possible for a valid obj
+        return bool(self.name)
 
 class Album(Meta):
+    """Info:
+    If a class that overrides __eq__() needs to retain the implementation of
+    __hash__() from a parent class, the interpreter must be told this explicitly
+    by setting __hash__ = <ParentClass>.__hash__.
+    """
     __hash__ = Meta.__hash__
 
     def __init__(self, **kwargs):
@@ -90,15 +96,15 @@ class Album(Meta):
 class Artist(Meta):
 
     def __init__(self, **kwargs):
-        self._aliases = []
+        self._aliases = set()
         super().__init__(**kwargs)
 
     def append(self, name):
-        self._aliases.append(name)
+        self._aliases.update({name,})
 
     @property
     def names(self):
-        return self._aliases + [self.name]
+        return self._aliases | {self.name,}
 
     def __add__(self, other):
         if isinstance(other, Artist):
@@ -109,14 +115,4 @@ class Artist(Meta):
             else:
                 raise NotSameArtist('different mbids: {0} and {1}'.format(self, other))
 
-
-class TrackMB(Track):
-
-    def __init__(self, **kwargs):
-        super().__init__(**kwargs)
-        if hasattr(self, 'musicbrainz_artistid'):
-            self.artist = Artist(mbid=self.musicbrainz_artistid,
-                                 name=self.artist)
-
 # vim: ai ts=4 sw=4 sts=4 expandtab
-