code: def name_insert_prefix(records, prefix):
      
      logging.info('Applying _name_insert_prefix generator: '
                   'Inserting prefix ' + prefix + ' for all '
                   'sequence IDs.')
      for record in records:
          new_id = prefix + record.id
          _update_id(record, new_id)
          yield record
docs: Given a set of sequences, insert a prefix for each sequence's name.