old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  # Copyright 2017 EMBL - European Bioinformatics Institute
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  # http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from rest_framework import routers
  
  
  class MetagenomicsAPIView(routers.APIRootView):
      """
      EBI Metagenomics API provides programmatic access to the data for cross-database complex queries. For more details review the documentation.  # noqa
      """
      pass
  
  
  class DefaultRouter(routers.DefaultRouter):
  
      """
      Custom default router extends the rest_framework DefaultRouter and
      adds in a default API root view
      """
  
      APIRootView = MetagenomicsAPIView
  
      def extend(self, router):
          self.registry.extend(router.registry)
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  # Copyright 2017 EMBL - European Bioinformatics Institute
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  # http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from rest_framework import routers
  
  
  class ApiBrowserView(routers.APIRootView):
      """EBI Metagenomics API provides programmatic access to the data for cross-database complex queries. For more details review the documentation."""  # noqa
      pass
  
  
  class DefaultRouter(routers.DefaultRouter):
  
      """
      Custom default router extends the rest_framework DefaultRouter and
      adds in a default API root view
      """
  
      APIRootView = ApiBrowserView
  
      def extend(self, router):
          self.registry.extend(router.registry)
  
subject: revert class name