=====================================================================
Python AMQP 0.9.1 client library

:Version: 5.3.1
:Web: https://amqp.readthedocs.io/
:Download: https://pypi.org/project/amqp/
:Source: http://github.com/celery/py-amqp/
:Keywords: amqp, rabbitmq

About

This is a fork of amqplib_ which was originally written by Barry Pederson.
It is maintained by the Celery_ project, and used by kombu_ as a pure python
alternative when librabbitmq_ is not available.

This library should be API compatible with librabbitmq_.

.. _amqplib: https://pypi.org/project/amqplib/
.. _Celery: http://celeryproject.org/
.. _kombu: https://kombu.readthedocs.io/
.. _librabbitmq: https://pypi.org/project/librabbitmq/

Differences from `amqplib`_

Supports draining events from multiple channels (Connection.drain_events)
Support for timeouts
Channels are restored after channel error, instead of having to close the
connection.
Support for heartbeats
- Connection.heartbeat_tick(rate=2) must called at regular intervals
  (half of the heartbeat value if rate is 2).
- Or some other scheme by using Connection.send_heartbeat.
Supports RabbitMQ extensions:
- Consumer Cancel Notifications
  - by default a cancel results in ChannelError being raised
  - but not if a on_cancel callback is passed to basic_consume.
- Publisher confirms
  - Channel.confirm_select() enables publisher confirms.
  - Channel.events['basic_ack'].append(my_callback) adds a callback
    to be called when a message is confirmed. This callback is then
    called with the signature (delivery_tag, multiple).
- Exchange-to-exchange bindings: exchange_bind / exchange_unbind.
  - Channel.confirm_select() enables publisher confirms.
  - Channel.events['basic_ack'].append(my_callback) adds a callback
    to be called when a message is confirmed. This callback is then
    called with the signature (delivery_tag, multiple).
- Authentication Failure Notifications
  Instead of just closing the connection abruptly on invalid
  credentials, py-amqp will raise an AccessRefused error
  when connected to rabbitmq-server 3.2.0 or greater.
Support for basic_return
Uses AMQP 0-9-1 instead of 0-8.
- Channel.access_request and ticket arguments to methods
  removed.
- Supports the arguments argument to basic_consume.
- internal argument to exchange_declare removed.
- auto_delete argument to exchange_declare deprecated
- insist argument to Connection removed.
- Channel.alerts has been removed.
- Support for Channel.basic_recover_async.
- Channel.basic_recover deprecated.
Exceptions renamed to have idiomatic names:
- AMQPException -> AMQPError
- AMQPConnectionException -> ConnectionError``
- AMQPChannelException -> ChannelError``
- Connection.known_hosts removed.
- Connection no longer supports redirects.
- exchange argument to queue_bind can now be empty
  to use the "default exchange".
Adds Connection.is_alive that tries to detect
whether the connection can still be used.
Adds Connection.connection_errors and .channel_errors,
a list of recoverable errors.
Exposes the underlying socket as Connection.sock.
Adds Channel.no_ack_consumers to keep track of consumer tags
that set the no_ack flag.
Slightly better at error recovery

Quick overview

Simple producer publishing messages to test queue using default exchange:

.. code:: python

import amqp

with amqp.Connection('broker.example.com') as c:
    ch = c.channel()
    ch.basic_publish(amqp.Message('Hello World'), routing_key='test')

Producer publishing to test_exchange exchange with publisher confirms enabled and using virtual_host test_vhost:

.. code:: python

import amqp

with amqp.Connection(
    'broker.example.com', exchange='test_exchange',
    confirm_publish=True, virtual_host='test_vhost'
) as c:
    ch = c.channel()
    ch.basic_publish(amqp.Message('Hello World'), routing_key='test')

Consumer with acknowledgments enabled:

.. code:: python

import amqp

with amqp.Connection('broker.example.com') as c:
    ch = c.channel()
    def on_message(message):
        print('Received message (delivery tag: {}): {}'.format(message.delivery_tag, message.body))
        ch.basic_ack(message.delivery_tag)
    ch.basic_consume(queue='test', callback=on_message)
    while True:
        c.drain_events()

Consumer with acknowledgments disabled:

.. code:: python

import amqp

with amqp.Connection('broker.example.com') as c:
    ch = c.channel()
    def on_message(message):
        print('Received message (delivery tag: {}): {}'.format(message.delivery_tag, message.body))
    ch.basic_consume(queue='test', callback=on_message, no_ack=True)
    while True:
        c.drain_events()

Speedups

This library has experimental support of speedups. Speedups are implemented using Cython. To enable speedups, CELERY_ENABLE_SPEEDUPS environment variable must be set during building/installation.
Currently speedups can be installed:

using source package (using --no-binary switch):

.. code:: shell

CELERY_ENABLE_SPEEDUPS=true pip install --no-binary :all: amqp

building directly source code:

.. code:: shell

CELERY_ENABLE_SPEEDUPS=true python setup.py install

Further

Differences between AMQP 0.8 and 0.9.1

http://www.rabbitmq.com/amqp-0-8-to-0-9-1.html
AMQP 0.9.1 Quick Reference

http://www.rabbitmq.com/amqp-0-9-1-quickref.html
RabbitMQ Extensions

http://www.rabbitmq.com/extensions.html
For more information about AMQP, visit

http://www.amqp.org
For other Python client libraries see:

http://www.rabbitmq.com/devtools.html#python-dev

.. |build-status| image:: https://github.com/celery/py-amqp/actions/workflows/ci.yaml/badge.svg
:alt: Build status
:target: https://github.com/celery/py-amqp/actions/workflows/ci.yaml

.. |coverage| image:: https://codecov.io/github/celery/py-amqp/coverage.svg?branch=main
:target: https://codecov.io/github/celery/py-amqp?branch=main

.. |license| image:: https://img.shields.io/pypi/l/amqp.svg
:alt: BSD License
:target: https://opensource.org/licenses/BSD-3-Clause

.. |wheel| image:: https://img.shields.io/pypi/wheel/amqp.svg
:alt: Python AMQP can be installed via wheel
:target: https://pypi.org/project/amqp/

.. |pyversion| image:: https://img.shields.io/pypi/pyversions/amqp.svg
:alt: Supported Python versions.
:target: https://pypi.org/project/amqp/

.. |pyimp| image:: https://img.shields.io/pypi/implementation/amqp.svg
:alt: Support Python implementations.
:target: https://pypi.org/project/amqp/

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