      def get_queryset(self):
          return super(HiddenInventoryManager, self).get_queryset().filter(hidden=False)
  
  
  @python_2_unicode_compatible
  class Inventory(models.Model):
      barcode = models.PositiveIntegerField(unique=True)
      parent = models.ForeignKey('self', models.SET_NULL, to_field='barcode', blank=True, null=True)
      name = models.CharField(blank=False, max_length=20)
      hidden = models.BooleanField(default=False)
 
</s> remove @python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add 
      def get_queryset(self):
          return super(HiddenInventoryManager, self).get_queryset().filter(hidden=False)
  
  

  class Inventory(models.Model):
      barcode = models.PositiveIntegerField(unique=True)
      parent = models.ForeignKey('self', models.SET_NULL, to_field='barcode', blank=True, null=True)
      name = models.CharField(blank=False, max_length=20)
      hidden = models.BooleanField(default=False)
keep keep keep keep replace keep keep keep keep keep
 Refs #23919 -- Removed python_2_unicode_compatible decorator usage 
tests/admin_widgets/models.py