The Global Interpreter Lock is the most-misunderstood thing about Python. It does NOT make Python single-threaded. It does NOT prevent concurrency. What it actually does is constrain CPU-bound parallelism in subtle ways -- and Python 3.13 ships an experimental no-GIL build that's about to change the conversation. Here's what you actually need to know.
Engineering Craft
TypeScript, CI/CD, databases, observability -- the skills that make code production-ready.
