Hashable artist and album, for #82

.gitignore

@@ -27,6 +27,7 @@ pip-log.txt
 pip-delete-this-directory.txt
 
 # Unit test / coverage reports
+htmlcov/
 .tox/
 .coverage
 .cache

pylast.py

@@ -1189,6 +1189,7 @@ class Album(_BaseObject, _Taggable):
     title = None
     artist = None
     username = None
+    __hash__ = _BaseObject.__hash__
 
     def __init__(self, artist, title, network, username=None):
         """
@@ -1358,6 +1359,7 @@ class Artist(_BaseObject, _Taggable):
 
     name = None
     username = None
+    __hash__ = _BaseObject.__hash__
 
     def __init__(self, name, network, username=None):
         """Create an artist object.

test_pylast.py

@@ -361,6 +361,32 @@ class TestPyLast(unittest.TestCase):
         self.assertTrue(type(tags[0])  == pylast.TopItem)
 
 
+    def test_album_is_hashable(self):
+        # Arrange
+        album = self.network.get_album("Test Artist", "Test Album")
+        albums = set()
+
+        # Act
+        albums.add(album)
+
+        # Assert
+        self.assertIsNotNone(album)
+        self.assertEqual(len(albums), 1)
+
+
+    def test_artist_is_hashable(self):
+        # Arrange
+        artist = self.network.get_artist("Test Artist")
+        artists = set()
+
+        # Act
+        artists.add(artist)
+
+        # Assert
+        self.assertIsNotNone(artist)
+        self.assertEqual(len(artists), 1)
+
+
     def test_track_is_hashable(self):
         # Arrange
         lastfm_user = self.network.get_user(self.username)
@@ -376,10 +402,6 @@ class TestPyLast(unittest.TestCase):
 
 
     def test_user_is_hashable(self):
-        # TODO same for some other types
-        # https://github.com/hugovk/pylast/issues/82
-        # (passes in Python 2.7 but how about 3?)
-
         # Arrange
         lastfm_user = self.network.get_user(self.username)
         users = set()