Merge lp:~dobey/ubuntuone-control-panel/fix-689800 into lp:ubuntuone-control-panel

[dobey]

Default to None and initialize if None in code, instead of mutable defaults

[Roberto Alsina (ralsina)]

This is a good practice in general.

review: Approve

[Natalia Bidart (nataliabidart)]

Awesome catch! Thanks

review: Approve

=== modified file 'ubuntuone/controlpanel/dbus_service.py'
--- ubuntuone/controlpanel/dbus_service.py	2010-12-09 16:59:06 +0000
+++ ubuntuone/controlpanel/dbus_service.py	2010-12-13 20:27:23 +0000
@@ -328,8 +328,10 @@
     return dbus.service.BusName(DBUS_BUS_NAME, bus=dbus.SessionBus())
 
 
-def publish_backend(backend=ControlBackend()):
+def publish_backend(backend=None):
     """Publish the backend on the DBus."""
+    if backend is None:
+        backend = ControlBackend()
     return ControlPanelBackend(backend=backend,
                                object_path=DBUS_PREFERENCES_PATH,
                                bus_name=get_busname())