  class Article(models.Model):
      author = models.ForeignKey(Author, on_delete=models.CASCADE)
  
  
  @python_2_unicode_compatible
  class MySQLUnixTimestamp(models.Model):
      timestamp = models.PositiveIntegerField()
  
      def __str__(self):
          return self.name
 
</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 
  class Article(models.Model):
      author = models.ForeignKey(Author, on_delete=models.CASCADE)
  
  

  class MySQLUnixTimestamp(models.Model):
      timestamp = models.PositiveIntegerField()
  
      def __str__(self):
          return self.name
keep keep keep keep replace keep keep keep keep keep
 Refs #23919 -- Removed python_2_unicode_compatible decorator usage 
tests/custom_lookups/models.py