handling closed spotify better

bumblebee/modules/spotify.py

@@ -14,6 +14,7 @@ import bumblebee.engine
 
 try:
     import dbus
+    from dbus.exceptions import DBusException
 except ImportError:
     pass
 
@@ -35,7 +36,7 @@ class Module(bumblebee.engine.Module):
             spotify_iface = dbus.Interface(spotify, 'org.freedesktop.DBus.Properties')
             props = spotify_iface.Get('org.mpris.MediaPlayer2.Player', 'Metadata')
             self._song = (str(props['xesam:artist'][0]) + " - " + str(props['xesam:title']))
-        except dbus.exceptions.DBusException:
-            self._song = "Error: DBus Exception"
+        except DBusException:
+            self._song = ""
 
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