      def __str__(self):
          return "%s/%s" % (self.device.name, self.port_number)
  
  
  @python_2_unicode_compatible
  class Connection(models.Model):
      start = models.ForeignKey(
          Port,
          models.CASCADE,
          related_name='connection_start',
 
</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 __str__(self):
          return "%s/%s" % (self.device.name, self.port_number)
  
  

  class Connection(models.Model):
      start = models.ForeignKey(
          Port,
          models.CASCADE,
          related_name='connection_start',
keep keep keep keep replace keep keep keep keep keep
 Refs #23919 -- Removed python_2_unicode_compatible decorator usage 
tests/select_related_regress/models.py