Enhance hello_consumer.py with detailed comments

examples/hello_consumer.py

@@ -1,11 +1,59 @@
+'''
+Importing compatibility features from future Python versions.
+absolute_import ensures imports behave like Python 3.
+unicode_literals makes all string literals unicode by default.
+print_function allows the use of print() as a function.
+'''
 from __future__ import absolute_import, unicode_literals, print_function
 
+'''
+Importing Connection class from kombu library.
+Kombu is a messaging library used to interact with message brokers
+like RabbitMQ using AMQP protocol.
+'''
 from kombu import Connection  # noqa
 
 
+'''
+Establishing a connection to the message broker.
+
+Connection URL breakdown:
+amqp://      -> protocol used (AMQP)
+guest:guest  -> username and password
+localhost    -> server where RabbitMQ is running
+5672         -> default RabbitMQ port
+//           -> default virtual host
+'''
 with Connection('amqp://guest:guest@localhost:5672//') as conn:
+
+    '''
+    Creating or accessing a queue named "simple_queue".
+    SimpleQueue provides an easy interface for sending
+    and receiving messages from the queue.
+    '''
     simple_queue = conn.SimpleQueue('simple_queue')
+
+    '''
+    Retrieving a message from the queue.
+
+    block=True  -> wait until a message arrives
+    timeout=1   -> wait for only 1 second before raising an error
+    '''
     message = simple_queue.get(block=True, timeout=1)
+
+    '''
+    Printing the message payload (actual data sent in the message).
+    '''
     print('Received: {0}'.format(message.payload))
+
+    '''
+    Acknowledging the message.
+    This tells the message broker that the message has been
+    successfully processed and can be removed from the queue.
+    '''
     message.ack()
+
+    '''
+    Closing the queue connection after processing the message.
+    '''
     simple_queue.close()