old_contents: from django.conf.urls import include, url
  
  from rest_framework.urlpatterns import format_suffix_patterns
  
  from views import (
      IndexPage,
      ExportOverview,
      ExportCreate,
      ExportDelete,
      ExportToRenderer,
      ExportGetExportContributions,
      ExportGetProjectCategories,
      ExportGetProjectCategoryContributions
  )
  
  
  datapatterns = [
      url(
          r'^admin/export/(?P<urlhash>[\w-]+)$',
          ExportToRenderer.as_view(),
          name='export_to_renderer')
  ]
  datapatterns = format_suffix_patterns(datapatterns, allowed=['json', 'kml'])
  
  
  urlpatterns = [
      url(
          r'^admin/export/$',
          IndexPage.as_view(),
          name='index'),
      url(
          r'^admin/export/(?P<export_id>[0-9]+)/$',
          ExportOverview.as_view(),
          name='export_overview'),
      url(
          r'^admin/export/(?P<export_id>[0-9]+)/contributions/$',
          ExportGetExportContributions.as_view(),
          name='export_get_export_contributions'),
      url(
          r'^admin/export/(?P<export_id>[0-9]+)/delete/$',
          ExportDelete.as_view(),
          name='export_delete'),
      url(
          r'^admin/export/create/$',
          ExportCreate.as_view(),
          name='export_create'),
      url(
          r'^admin/export/projects/(?P<project_id>[0-9]+)/categories/$',
          ExportGetProjectCategories.as_view(),
          name='export_get_project_categories'),
      url(
          r'^admin/export/projects/(?P<project_id>[0-9]+)/categories/(?P<category_id>[0-9]+)/contributions/$',
          ExportGetProjectCategoryContributions.as_view(),
          name='export_get_project_category_contributions'),
      url(
          r'^', include(datapatterns))
  ]
  
new_contents: from django.conf.urls import include, url
  
  from rest_framework.urlpatterns import format_suffix_patterns
  
  from views import (
      IndexPage,
      ExportOverview,
      ExportCreate,
      ExportDelete,
      ExportToRenderer,
      ExportGetExportContributions,
      ExportGetProjectCategories,
      ExportGetProjectCategoryContributions
  )
  
  
  datapatterns = [
      url(
          r'^admin/export/(?P<urlhash>[\w-]+)$',
          ExportToRenderer.as_view(),
          name='export_to_renderer')
  ]
  datapatterns = format_suffix_patterns(datapatterns, allowed=['json', 'kml','csv'])
  
  
  urlpatterns = [
      url(
          r'^admin/export/$',
          IndexPage.as_view(),
          name='index'),
      url(
          r'^admin/export/(?P<export_id>[0-9]+)/$',
          ExportOverview.as_view(),
          name='export_overview'),
      url(
          r'^admin/export/(?P<export_id>[0-9]+)/contributions/$',
          ExportGetExportContributions.as_view(),
          name='export_get_export_contributions'),
      url(
          r'^admin/export/(?P<export_id>[0-9]+)/delete/$',
          ExportDelete.as_view(),
          name='export_delete'),
      url(
          r'^admin/export/create/$',
          ExportCreate.as_view(),
          name='export_create'),
      url(
          r'^admin/export/projects/(?P<project_id>[0-9]+)/categories/$',
          ExportGetProjectCategories.as_view(),
          name='export_get_project_categories'),
      url(
          r'^admin/export/projects/(?P<project_id>[0-9]+)/categories/(?P<category_id>[0-9]+)/contributions/$',
          ExportGetProjectCategoryContributions.as_view(),
          name='export_get_project_category_contributions'),
      url(
          r'^', include(datapatterns))
  ]
  
subject: add csv as allowed format