      include_root_view = True
      include_format_suffixes = True
      root_view_name = 'api-root'
  
      def get_api_root_view(self):
          """
          Return a view to use as the API root.
          """
          api_root_dict = OrderedDict()
          list_name = self.routes[0].name
 
</s> remove         urls = []
 </s> add         urls = super(DefaultRouter, self).get_urls()
    def get_api_root_view(self, schema_urls=None):
      include_root_view = True
      include_format_suffixes = True
      root_view_name = 'api-root'
  
    def get_api_root_view(self, schema_urls=None):
          """
          Return a view to use as the API root.
          """
          api_root_dict = OrderedDict()
          list_name = self.routes[0].name
keep keep keep keep replace keep keep keep keep keep
 Schemas & client libraries. (#4179)

* Added schema generation support.
* New tutorial section.
* API guide on schema generation.
* Topic guide on API clients. 
rest_framework/routers.py