handle return value of del_message

tubearchivist/home/src/helper.py

@@ -104,7 +104,8 @@ def get_message(key):
 def del_message(key):
     """delete key from redis"""
     redis_connection = redis.Redis(host=REDIS_HOST)
-    redis_connection.execute_command("DEL", key)
+    response = redis_connection.execute_command("DEL", key)
+    return response
 
 
 def get_dl_message(cache_dir):

tubearchivist/home/tasks.py

@@ -133,7 +133,7 @@ def run_restore_backup():
 def kill_dl(task_id):
     """kill download worker task by ID"""
     app.control.revoke(task_id, terminate=True)
-    del_message("dl_queue_id")
+    _ = del_message("dl_queue_id")
     RedisQueue("dl_queue").clear()
 
     # clear cache