from flashcards.models import Section, LecturePeriod
  from flashcards.serializers import SectionSerializer, LecturePeriodSerializer
  from rest_framework.permissions import IsAuthenticatedOrReadOnly
  from rest_framework.viewsets import ModelViewSet

  REST_FRAMEWORK = {
          'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.CursorPagination',
          'PAGE_SIZE': 20
          }

  
  class SectionViewSet(ModelViewSet):
      queryset = Section.objects.all()
      serializer_class = SectionSerializer
      permission_classes = (IsAuthenticatedOrReadOnly,)
  
  class LecturePeriodViewSet(ModelViewSet):
      queryset = LecturePeriod.objects.all()
      serializer_class = LecturePeriodSerializer

      permission_classes = (IsAuthenticatedOrReadOnly,)