code: def name_append_suffix(records, suffix):
      
      logging.info('Applying _name_append_suffix generator: '
                   'Appending suffix ' + suffix + ' to all '
                   'sequence IDs.')
      for record in records:
          new_id = record.id + suffix
          _update_id(record, new_id)
          yield record
docs: Given a set of sequences, append a suffix for each sequence's name.