def create_action(quality):
    def action(modeladmin, request, queryset): queryset.update(quality=quality)
    name = "mark_%s" % (quality,)
    return (name, (action, name, "Mark selected as %s quality" % (quality,)))

class PackageAdmin(admin.ModelAdmin):
    list_display = ('name', 'quality')
            
    def get_actions(self, request):
        return dict(create_action(q) for q in models.Quality.objects.all())