code: def download(config, account, day, region, output):
      
  
      with open(config) as fh:
          config = yaml.safe_load(fh.read())
  
      jsonschema.validate(config, CONFIG_SCHEMA)
  
      found = None
      for info in config['accounts']:
          if info['name'] == account:
              found = info
              break
  
      if not found:
          log.info("Account %s not found", account)
          return
  
      s3 = boto3.client('s3')
      day = parse_date(day)
  
      key_data = dict(found)
      key_data['region'] = region
      key_data['date_fmt'] = "%s/%s/%s" % (
          day.year, day.month, day.day)
      key = config['key_template'] % key_data
  
      s3.download_file(found['bucket'], key, output + '.bz2')
      subprocess.check_call(["lbzip2", "-d", output + '.bz2'])
docs: Download a traildb file for a given account/day/region