FreeBSD Jails are a well-known feature and have become core to many excellent tools on FreeBSD such as the Poudriere package builder. Jails offer process and file system isolation, but for a long time they did not offer very satisfying network isolation. VIMAGE provides isolation for networking through virtual network stacks or VNET.
Source: Virtualize Your Network on FreeBSD with VNET, an article by Tom Jones.
SwiftIO is an electronic circuit board that runs Swift on the bare metal. It can control sensors, displays, lights, motors and more.
Source: Getting started with SwiftIO, an article by Tibor Bödecs.
What happens when we get or set an attribute of a Python object? This question is not as simple as it may seem at first. It is true that any experienced Python programmer has a good intuitive understanding of how attributes work, and the documentation helps a lot to strengthen the understanding. Yet, when a really non-trivial question regarding attributes comes up, the intuition fails and the documentation can no longer help. To gain a deep understanding and be able to answer such questions, one has to study how attributes are implemented. That's what we're going to do today.
Source: Python behind the scenes #7: how Python attributes work, an article by Victor Skvortsov.