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Low-level AMQP client for Python (fork of amqplib)

Project description





amqp, rabbitmq


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.

Differences from amqplib

  • Supports draining events from multiple channels (Connection.drain_events)

  • Support for timeouts

  • 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

  • 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


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