Merge pull request #6932 from adferrand/pylint-squash

Update Pylint to 1.9.4 (squashed PR)

certbot-dns-cloudflare/certbot_dns_cloudflare/dns_cloudflare.py

@@ -159,7 +159,7 @@ class _CloudflareClient(object):
                                          'you have supplied valid Cloudflare API credentials.{2}'
                                          .format(code, e, ' ({0})'.format(hint) if hint else ''))
 
-            if len(zones) > 0:
+            if zones:
                 zone_id = zones[0]['id']
                 logger.debug('Found zone_id of %s for %s using name %s', zone_id, domain, zone_name)
                 return zone_id
@@ -191,9 +191,9 @@ class _CloudflareClient(object):
             logger.debug('Encountered CloudFlareAPIError getting TXT record_id: %s', e)
             records = []
 
-        if len(records) > 0:
+        if records:
             # Cleanup is returning the system to the state we found it. If, for some reason,
             # there are multiple matching records, we only delete one because we only added one.
             return records[0]['id']
-        else:
-            logger.debug('Unable to find TXT record.')
+        logger.debug('Unable to find TXT record.')
+        return None