  import inspect
  
  from django.db import models
  from django.utils.text import capfirst
  
  from rest_framework.compat import clean_manytomany_helptext
  from rest_framework.validators import UniqueValidator
  
  
 
</s> remove import inspect
 </s> add  </s> remove from django.core import validators
 </s> add import inspect
 </s> remove from django.core.exceptions import ImproperlyConfigured
from django.db import models
 </s> add  </s> remove from rest_framework.compat import django_filters, guardian, get_model_name
 </s> add from django.db import models
from django.core.exceptions import ImproperlyConfigured

from django.core import validators
  import inspect
  
  from django.db import models
from django.core import validators
  from django.utils.text import capfirst
  
  from rest_framework.compat import clean_manytomany_helptext
  from rest_framework.validators import UniqueValidator
  
  
keep keep add keep keep keep keep keep keep
 Cleanup import following PEP 8 style guide 
rest_framework/utils/field_mapping.py