The Python extension module sysv_ipc gives Python access
to SysV inter-process semaphores, shared memory and message queues on nearly all
flavors of Unix, and perhaps Windows + Cygwin or WSL.
It allows Python applications to perform IPC with non-Python programs. If
you want to IPC between Python programs, you're better off using the
multiprocessing module.
As of January 2026, the code and documentation are hosted at GitHub:
https://github.com/osvenskan/sysv_ipc/
You can download installable wheels from PyPI.