# Using the BlockingChannel.consume generator to consume messages

The `BlockingChannel.consume` method is a generator that will return a tuple of method, properties and body.

When you escape out of the loop, be sure to call consumer.cancel() to return any unprocessed messages.

Example of consuming messages and acknowledging them:

    import pika

    connection = pika.BlockingConnection()
    channel = connection.channel()

    # Get ten messages and break out
    for method_frame, properties, body in channel.consume('test'):

        # Display the message parts
        print(method_frame)
        print(properties)
        print(body)

        # Acknowledge the message
        channel.basic_ack(method_frame.delivery_tag)

        # Escape out of the loop after 10 messages
        if method_frame.delivery_tag == 10:
            break

    # Cancel the consumer and return any pending messages
    requeued_messages = channel.cancel()
    print('Requeued %i messages' % requeued_messages)

    # Close the channel and the connection
    channel.close()
    connection.close()

If you have pending messages in the test queue, your output should look something like:

    (pika)gmr-0x02:pika gmr$ python blocking_nack.py
    <Basic.Deliver(['consumer_tag=ctag1.0', 'redelivered=True', 'routing_key=test', 'delivery_tag=1', 'exchange=test'])>
    <BasicProperties(['delivery_mode=1', 'content_type=text/plain'])>
    Hello World!
    <Basic.Deliver(['consumer_tag=ctag1.0', 'redelivered=True', 'routing_key=test', 'delivery_tag=2', 'exchange=test'])>
    <BasicProperties(['delivery_mode=1', 'content_type=text/plain'])>
    Hello World!
    <Basic.Deliver(['consumer_tag=ctag1.0', 'redelivered=True', 'routing_key=test', 'delivery_tag=3', 'exchange=test'])>
    <BasicProperties(['delivery_mode=1', 'content_type=text/plain'])>
    Hello World!
    <Basic.Deliver(['consumer_tag=ctag1.0', 'redelivered=True', 'routing_key=test', 'delivery_tag=4', 'exchange=test'])>
    <BasicProperties(['delivery_mode=1', 'content_type=text/plain'])>
    Hello World!
    <Basic.Deliver(['consumer_tag=ctag1.0', 'redelivered=True', 'routing_key=test', 'delivery_tag=5', 'exchange=test'])>
    <BasicProperties(['delivery_mode=1', 'content_type=text/plain'])>
    Hello World!
    <Basic.Deliver(['consumer_tag=ctag1.0', 'redelivered=True', 'routing_key=test', 'delivery_tag=6', 'exchange=test'])>
    <BasicProperties(['delivery_mode=1', 'content_type=text/plain'])>
    Hello World!
    <Basic.Deliver(['consumer_tag=ctag1.0', 'redelivered=True', 'routing_key=test', 'delivery_tag=7', 'exchange=test'])>
    <BasicProperties(['delivery_mode=1', 'content_type=text/plain'])>
    Hello World!
    <Basic.Deliver(['consumer_tag=ctag1.0', 'redelivered=True', 'routing_key=test', 'delivery_tag=8', 'exchange=test'])>
    <BasicProperties(['delivery_mode=1', 'content_type=text/plain'])>
    Hello World!
    <Basic.Deliver(['consumer_tag=ctag1.0', 'redelivered=True', 'routing_key=test', 'delivery_tag=9', 'exchange=test'])>
    <BasicProperties(['delivery_mode=1', 'content_type=text/plain'])>
    Hello World!
    <Basic.Deliver(['consumer_tag=ctag1.0', 'redelivered=True', 'routing_key=test', 'delivery_tag=10', 'exchange=test'])>
    <BasicProperties(['delivery_mode=1', 'content_type=text/plain'])>
    Hello World!
    Requeued 1894 messages