Error queue excluded from list queues prefix in ListQueues check

[andrewatwood]

Say I have two existing queues: a queue process-queue and an error queue error-queue.

My error queue is never flagged as existing because the ListQueues operation is prefixed to the main queue name:

python-sqs-listener/sqs_listener/__init__.py

Lines 85 to 94 in 03400ca

	queues = sqs.list_queues(QueueNamePrefix=self._queue_name)
	main_queue_exists = False
	error_queue_exists = False
	if 'QueueUrls' in queues:
	for q in queues['QueueUrls']:
	qname = q.split('/')[-1]
	if qname == self._queue_name:
	main_queue_exists = True
	if self._error_queue_name and qname == self._error_queue_name:
	error_queue_exists = True

The listener attempts to create the error queue since it wasn't found, and gets a QueueAlreadyExists error immediately.

If I specify the error queue as process-queue-error and it already exists, I don't get any errors, because it comes back in the ListQueues call that uses the prefix.

A couple solutions to this but it's a pretty big issue for anyone using pre-created queues.

[jegesh]

Yeah the code is pretty naive about these things. Feel free to submit a PR with your implementation to solve your issue.