  from django.db import models
  from django.utils.encoding import python_2_unicode_compatible
  
  
  @python_2_unicode_compatible
  class Author(models.Model):
      Author_ID = models.AutoField(primary_key=True, db_column='Author ID')
      first_name = models.CharField(max_length=30, db_column='firstname')
      last_name = models.CharField(max_length=30, db_column='last')
  
 
</s> remove from django.utils.encoding import 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 
  from django.db import models
  from django.utils.encoding import python_2_unicode_compatible
  
  

  class Author(models.Model):
      Author_ID = models.AutoField(primary_key=True, db_column='Author ID')
      first_name = models.CharField(max_length=30, db_column='firstname')
      last_name = models.CharField(max_length=30, db_column='last')
  
keep keep keep keep replace keep keep keep keep keep
 Refs #23919 -- Removed python_2_unicode_compatible decorator usage 
tests/custom_columns/models.py