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.

The plan was to mark them as deprecated for 3.11 and 3.12, and then remove them entirely in Python 3.13. As of now, those “dead batteries” (as they’ve been called) are now permanently removed.