I use multicast a lot in my work, and I almost always wind up using my branch of PyZeroconf's mcastsocket module... and that's not cleanly pip installable, so I've now broken out the mcastsocket module into its own project. Changes with this release:

• implements (IPv4-only) single-source-multicast support
• should work cleanly on python 3.5 (it may have worked on 3.5 before, I honestly have no idea)
• has Travis CI/Tox tests (though only a tiny set of tests)

Multicast away.