From a833364accb827c15c2644403759b0f4627c807d Mon Sep 17 00:00:00 2001
From: Stefan Friedli <stefan.friedli@zuehlke.com>
Date: Mon, 20 Nov 2023 14:31:09 +0100
Subject: [PATCH] Fix empty response on sqs dequeue (#14)

---
 polytope_server/common/queue/sqs_queue.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/polytope_server/common/queue/sqs_queue.py b/polytope_server/common/queue/sqs_queue.py
index 9f396a9..2892aad 100644
--- a/polytope_server/common/queue/sqs_queue.py
+++ b/polytope_server/common/queue/sqs_queue.py
@@ -1,8 +1,10 @@
 import json
 import logging
-from . import queue
+
 import boto3
+
 from ..metric_collector import SQSQueueMetricCollector
+from . import queue
 
 
 class SQSQueue(queue.Queue):
@@ -30,7 +32,7 @@ def dequeue(self):
             VisibilityTimeout=self.visibility_timeout,  # If processing takes more seconds, message will be read twice
             MaxNumberOfMessages=1,
         )
-        if not response["Messages"]:
+        if "Messages" not in response:
             return None
 
         msg, *remainder = response["Messages"]