Background worker in python using pika doesn't logs print

[rmonnier9]

Hi,

I’m building a background worker in python.
My code is very simple and works fine but my “print” statements are not displayed in the logs.

I noticed that everything works fine without the pika library (RabbitMQ) but when I add it in the script, the “print” statements stop to appear.

Here is my code :

import pika
import os

# Get RabbitMQ URL from environment variable or use a default
RABBITMQ_URL = os.getenv('RABBITMQ_URL', 'amqp://user:password@localhost')

# Connect to RabbitMQ using the URL
params = pika.URLParameters(RABBITMQ_URL)
connection = pika.BlockingConnection(params)
channel = connection.channel()

channel.queue_declare(queue='task_queue',
                    #   durable=True
                      )

def callback(ch, method, properties, body):
    print(" [x] Received %r" % body)
    ch.basic_ack(delivery_tag=method.delivery_tag)


channel.basic_consume(queue='task_queue', on_message_callback=callback)

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

But when using the logging library, the logging appears (and so everything works fine).

import pika
import os
import logging

logging.basicConfig(level=logging.INFO)  # Ou DEBUG pour plus de détails
logger = logging.getLogger(__name__)

logger.info("Démarrage de l'application...")

# Get RabbitMQ URL from environment variable or use a default
RABBITMQ_URL = os.getenv('RABBITMQ_URL', 'amqp://user:password@localhost')

print(RABBITMQ_URL)

# Connect to RabbitMQ using the URL
params = pika.URLParameters(RABBITMQ_URL)
connection = pika.BlockingConnection(params)
channel = connection.channel()

channel.queue_declare(queue='task_queue',
                    #   durable=True
                      )

def callback(ch, method, properties, body):
    print(" [x] Received %r" % body)
    ch.basic_ack(delivery_tag=method.delivery_tag)


channel.basic_consume(queue='task_queue', on_message_callback=callback)

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

Do you have any idea ? What pika does that prevent showing the “print” ?

Thanks for your help.

[mmaddex]

Hi rmonnier9,

Render logs everything output to STDOUT. So you’ll need to make sure you configure your logging library to output to STDOUT.

Regards,

Matt