With collaboration with Nick Coghlan (the original author of PEP 501), we would like to propose reopening PEP 501 after 7 years of being differed. In those seven years, f-strings have become common idiomatic python, and people are familiar and comfortable with them. Also, since then, PEP 701 has been accepted, which adds even more power, and a reference implementation to for PEP 501.
As such, a PR has been created in favor of reconsidering PEP 501, with additions and improvements on things learned. Re-open PEP 501 in consideration of PEP 701 by nhumrich · Pull Request #3047 · python/peps · GitHub
A built version of the new PEP is currently located: PEP 501 – General purpose string template literals | peps.python.org