  from django.db import models
  from django.utils.encoding import python_2_unicode_compatible
  
  
  @python_2_unicode_compatible
  class Author(models.Model):
      name = models.CharField(max_length=100)
      age = models.IntegerField()
      friends = models.ManyToManyField('self', blank=True)
  
 
</s>
  from django.db import models
  from django.utils.encoding import python_2_unicode_compatible
  
  

  class Author(models.Model):
      name = models.CharField(max_length=100)
      age = models.IntegerField()
      friends = models.ManyToManyField('self', blank=True)
  
keep keep keep keep replace keep keep keep keep keep
 Refs #23919 -- Removed python_2_unicode_compatible decorator usage
tests/aggregation_regress/models.py