713 def delete_file self instance 714 if getattr instance self attname

713     def delete_file(self, instance):
714         if getattr(instance, self.attname):
715             file_name = getattr(instance, 'get_%s_filename' % self.name)()
716             # If the file exists and no other object of this type references     it,
717             # delete it from the filesystem.
718             if os.path.exists(file_name) and \
719                 not instance.__class__._default_manager.filter(**{'%s__exact    ' % self.name: getattr(instance, self.attname)}):
720                 os.remove(file_name)