new_contents: import logging
  import click
  from pprint import pprint as pp
  
  from flask.cli import with_appcontext
  
  from scout.server.extensions import store
  
  LOG = logging.getLogger(__name__)
  
  
  @click.command('exons', short_help='Display exons')
  @click.option('-b', '--build', default='37', type=click.Choice(['37', '38']))
  @click.option('-i', '--hgnc-id', type=int)
  @click.option('--json', is_flag=True)
  @with_appcontext
  def exons(build, hgnc_id, json):
      """Show exons in the database"""
      LOG.info("Running scout view exons")
      adapter = store
      
      exon = adapter.exon(build=build)
      
      pp(exon)
  
      # if not json:
      #     click.echo("Chromosome\tstart\tend\ttranscript_id\thgnc_id\trefseq\tis_primary")
      # i = 0
      # for i,tx_obj in enumerate(adapter.transcripts(build=build, hgnc_id=hgnc_id),1):
      #     if json:
      #         pp(tx_obj)
      #         continue
      #     click.echo("{0}\t{1}\t{2}\t{3}\t{4}\t{5}\t{6}".format(
      #         tx_obj['chrom'],
      #         tx_obj['start'],
      #         tx_obj['end'],
      #         tx_obj['ensembl_transcript_id'],
      #         tx_obj['hgnc_id'],
      #         tx_obj.get('refseq_id', ''),
      #         tx_obj.get('is_primary') or '',
      #     ))
      # if i == 0:
      #     LOG.info("Could not find gene %s", hgnc_id)
  
subject: Add command to view exons in the database