[Python] rabbitmq python pika stop consuming if queue is empty

I have simply code retrieving messages from queue but keep waiting for new messages how can I continue execution after all messages retrieved ?

import pika, sys, os

def main():
connection = pika.BlockingConnection(pika.ConnectionParameters('localhost',credentials=pika.PlainCredentials('user','pass')))
channel = connection.channel()

channel.queue_declare(queue='test')

def callback(ch, method, properties, body):
print(f" [x] Received {body}")

channel.basic_consume(queue='sms', on_message_callback=callback, auto_ack=True)

print(' [*] Waiting for messages. To exit press CTRL+C')
channel.start_consuming()

if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
print('Interrupted')
try:
sys.exit(0)
except SystemExit:
os._exit(0)

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