import pika 
##import amqp
import config
#declaring the credentials needed for connection like host, port, username, password, exchange etc
credentials= pika.PlainCredentials(username= config.username, password= config.password)
connection= pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=61616, credentials= credentials))
channel = connection.channel()
channel.exchange_declare(exchange='pydev', durable=True, exchange_type='topic')
channel.queue_declare(queue= 'A')
channel.queue_bind(exchange='pydev', queue='A', routing_key='A')
channel.queue_declare(queue= 'B')
channel.queue_bind(exchange='pydev', queue='B', routing_key='B')
channel.queue_declare(queue= 'C')
channel.queue_bind(exchange='pydev', queue='C', routing_key='C')
#messaging to queue named C
message_spec= 'Only this channel can see this message'
message_all= 'Welcome to python queue handling...'
channel.basic_publish(exchange='pydev', routing_key='A', body= message_all)
channel.basic_publish(exchange='pydev', routing_key='B', body= message_all)
channel.basic_publish(exchange='pydev', routing_key='C', body= message_all)
channel.basic_publish(exchange='pydev', routing_key='B', body= message_spec)
channel.basic_publish(exchange='pydev', routing_key='C', body= message_spec)
channel.close()