text: from rest_framework import viewsets
  
  # models
  from core.models import Fraction
  
  # serializers
  from core.api.serializers import FractionSerializer
  
  # *****************************************************************************************
  # Fraction
  # *****************************************************************************************
  class FractionViewSet(viewsets.ReadOnlyModelViewSet):
      """
      read-only viewset for listing fractions
      """
      def get_queryset(self):
          return Fraction.objects.filter(parlament=self.kwargs['parlament_pk']).order_by('id')
  
      serializer_class = FractionSerializer