  from django.core.exceptions import ImproperlyConfigured, ValidationError
  from django.db import models
  from django.db.models.signals import pre_delete, pre_save
  from django.http.request import split_domain_port
  from django.utils.encoding import python_2_unicode_compatible
  from django.utils.translation import ugettext_lazy as _
  
  SITE_CACHE = {}
  
  
 
</s> remove from django.utils.encoding import force_text, python_2_unicode_compatible
 </s> add from django.utils.encoding import force_text </s> remove from django.utils.encoding import python_2_unicode_compatible
 </s> add  </s> remove from django.utils.encoding import python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add  </s> remove from django.utils.encoding import force_text, python_2_unicode_compatible
 </s> add from django.utils.encoding import force_text
  from django.core.exceptions import ImproperlyConfigured, ValidationError
  from django.db import models
  from django.db.models.signals import pre_delete, pre_save
  from django.http.request import split_domain_port

  from django.utils.translation import ugettext_lazy as _
  
  SITE_CACHE = {}
  
  
keep keep keep keep replace keep keep keep keep keep
 Refs #23919 -- Removed python_2_unicode_compatible decorator usage 
django/contrib/sites/models.py