report current export state status

def status(config, group, accounts=(), region=None):
    """report current export state status"""
    config = validate.callback(config)
    destination = config.get('destination')
    client = boto3.Session().client('s3')

    for account in config.get('accounts', ()):
        if accounts and account['name'] not in accounts:
            continue

        session = get_session(account['role'], region)
        account_id = session.client('sts').get_caller_identity()['Account']
        prefix = destination.get('prefix', '').rstrip('/') + '/%s' % account_id
        prefix = "%s/flow-log" % prefix

        role = account.pop('role')
        if isinstance(role, six.string_types):
            account['account_id'] = role.split(':')[4]
        else:
            account['account_id'] = role[-1].split(':')[4]

        account.pop('groups')

        try:
            tag_set = client.get_object_tagging(
                Bucket=destination['bucket'], Key=prefix).get('TagSet', [])
        except ClientError:
            account['export'] = 'missing'
            continue
        tags = {t['Key']: t['Value'] for t in tag_set}

        if 'LastExport' not in tags:
            account['export'] = 'empty'
        else:
            last_export = parse(tags['LastExport'])
            account['export'] = last_export.strftime('%Y/%m/%d')

    accounts = [a for a in config.get('accounts') if a in accounts or not accounts]
    accounts.sort(key=operator.itemgetter('export'), reverse=True)
    print(tabulate(accounts, headers='keys'))