doccano/backend/data_export/urls.py

from django.urls import path

from .views import DatasetCatalog, DatasetExportAPI

urlpatterns = [
    path(
        route='projects/<int:project_id>/download-format',
        view=DatasetCatalog.as_view(),
        name='download-format'
    ),
    path(
        route='projects/<int:project_id>/download',
        view=DatasetExportAPI.as_view(),
        name='download-dataset'
    ),
]