old_contents: # -*- coding: utf-8 -*-
  
  """
  Copyright [2009-2017] 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.
  """
  
  import csv
  
  import luigi
  
  from tasks.config import db
  from tasks.config import export
  from tasks.utils.files import atomic_output
  
  from rnacentral.export.ftp import id_mapping
  
  
  class IdMapping(luigi.Task):
      def output(self):
          return luigi.LocalTarget(export().id_mapping('id_mapping.tsv'))
  
      def run(self):
          with atomic_output(self.output()) as out:
              writer = csv.writer(out, delimiter='\t')
              writer.writerows(id_mapping.complete(db()))
  
new_contents: # -*- coding: utf-8 -*-
  
  """
  Copyright [2009-2017] 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.
  """
  
  import csv
  
  import luigi
  
  from tasks.config import db
  from tasks.config import export
  from tasks.utils.files import atomic_output
  
  from rnacentral.export.ftp import id_mapping
  
  
  class IdMapping(luigi.Task):
      def output(self):
          return luigi.LocalTarget(
              export().id_mapping('id_mapping.tsv.gz'),
              format=luigi.format.Gzip,
          )
  
      def run(self):
          with atomic_output(self.output()) as out:
              writer = csv.writer(out, delimiter='\t')
              writer.writerows(id_mapping.complete(db()))
  
subject: Write a compressed file