code: def ls(sess_id_or_alias, path):
      
      with Session() as session:
          try:
              print_wait('Retrieving list of files in "{}"...'.format(path))
              kernel = session.Kernel(sess_id_or_alias)
              result = kernel.list_files(path)
  
              if 'errors' in result and result['errors']:
                  print_fail(result['errors'])
                  sys.exit(1)
  
              files = json.loads(result['files'])
              table = []
              headers = ['file name', 'size', 'modified', 'mode']
              for file in files:
                  mdt = datetime.fromtimestamp(file['mtime'])
                  mtime = mdt.strftime('%b %d %Y %H:%M:%S')
                  row = [file['filename'], file['size'], mtime, file['mode']]
                  table.append(row)
              print_done('Retrived.')
              print('Path in container:', result['abspath'], end='')
              print(tabulate(table, headers=headers))
          except Exception as e:
              print_error(e)
              sys.exit(1)
docs: List files in a path of a running container.
  
      \b
      SESSID: Session ID or its alias given when creating the session.
      PATH: Path inside container.