T-strings use the exact same syntax as f‑strings, but their “format spec” (the part after the optional :, like .2f) can effectively be anything.

That might make creating a quiz tricky? With f‑strings, Python immediately calls format() on that spec; with t‑strings, it's simply captured in Interpolation.format_spec. It's up to your code to decide whether to call format() or do something entirely different with this value.