I am practicing RabbitMQ through Official documents tutorial 4 on my MacBook
This is the final section code:
emit_log_direct.py
#!/usr/bin/env python
import pika
import sys
connection = pika.BlockingConnection(
pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.exchange_declare(exchange='direct_logs', exchange_type='direct')
severity = sys.argv[1] if len(sys.argv) > 1 else 'info'
message = ' '.join(sys.argv[2:]) or 'Hello World!'
channel.basic_publish(
exchange='direct_logs', routing_key=severity, body=message)
print(" [x] Sent %r:%r" % (severity, message))
connection.close()
and receive_logs_direct.py
#!/usr/bin/env python
import pika
import sys
connection = pika.BlockingConnection(
pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.exchange_declare(exchange='direct_logs', exchange_type='direct')
result = channel.queue_declare(queue='', exclusive=True)
queue_name = result.method.queue
severities = sys.argv[1:]
if not severities:
sys.stderr.write("Usage: %s [info] [warning] [error]\n" % sys.argv[0])
sys.exit(1)
for severity in severities:
channel.queue_bind(
exchange='direct_logs', queue=queue_name, routing_key=severity)
print(' [*] Waiting for logs. To exit press CTRL+C')
def callback(ch, method, properties, body):
print(" [x] %r:%r" % (method.routing_key, body))
channel.basic_consume(
queue=queue_name, on_message_callback=callback, auto_ack=True)
channel.start_consuming()
If I run :
python receive_logs_direct.py info warning error
it works fine, messages will show on screen
but if I add redirection like tutorial
python receive_logs_direct.py warning error > logs_from_rabbit.log
there is nothing write on logs_from_rabbit.log file
and I trying tee, the result is same, nothing to show
python receive_logs_direct.py warning error | tee logs_from_rabbit.log
but if I annotation receive_logs_direct.py last line channel.start_consuming(), print will working
maybe where I made mistake?