Version 1.4.0 is available upstream. Please consider updating! It seems that version 1.4.0 is available upstream, while the latest version in the Gentoo tree is 1.3.2. This information is provided from Release-Monitoring, so fix association issues there.
Pika is a pure-Python implementation of the AMQP 0-9-1 protocol that tries to stay fairly independent of the underlying network support library. Pika was developed primarily for use with RabbitMQ, but should also work with other AMQP 0-9-1 brokers.