Python 3.14 has a new feature called the template string, or t-string, type. A t-string superficially resembles an f-string, but it’s designed to do something very different.

Official support for free-threaded Python, an experimental JIT, and a smarter installation manager for Windows are among the goodies in Python 3.14. Now in a release candidate.

Most Python developers never learned this feature, even though they use it every single day. All of the popular frameworks like Flask, FastAPI, Django, Pydantic, SQL, Alchemy; they all use ...