satella
satella.posix in unavailable on non-POSIX systems, but the rest should work OK.
Full documentation is available for the brave souls that do decide to use this library.
Satella is a zero-requirements Python 3.5+ library for writing server applications, especially those dealing with mundane but useful things. It also runs on PyPy.
See LICENSE for text of the license.
satella 1.0 remains in maintenance mode