Merge pull request #149 from hugovk/mbid_fix

Only get the top-level <mbid>

pylast/__init__.py

@@ -1809,8 +1809,21 @@ class _Opus(_BaseObject, _Taggable):
     def get_mbid(self):
         """Returns the MusicBrainz ID of the album or track."""
 
-        return _extract(
-            self._request(self.ws_prefix + ".getInfo", cacheable=True), "mbid")
+        doc = self._request(self.ws_prefix + ".getInfo", cacheable=True)
+
+        try:
+            lfm = doc.getElementsByTagName('lfm')[0]
+            opus = self._get_children_by_tag_name(lfm, self.ws_prefix).next()
+            mbid = self._get_children_by_tag_name(opus, "mbid").next()
+            return mbid.firstChild.nodeValue
+        except StopIteration:
+            return None
+
+    def _get_children_by_tag_name(self, node, tag_name):
+        for child in node.childNodes:
+            if (child.nodeType == child.ELEMENT_NODE and
+               (tag_name == '*' or child.tagName == tag_name)):
+                yield child
 
 
 class Album(_Opus):

tests/test_pylast.py

@@ -1972,5 +1972,15 @@ class TestPyLast(unittest.TestCase):
         # Assert
         self.assertEqual(corrected_track_name, "Mr. Brownstone")
 
+    def test_track_with_no_mbid(self):
+        # Arrange
+        track = pylast.Track("Static-X", "Set It Off", self.network)
+
+        # Act
+        mbid = track.get_mbid()
+
+        # Assert
+        self.assertEqual(mbid, None)
+
 if __name__ == '__main__':
     unittest.main(failfast=True)