An early stage PEP that introduces tag strings - a natural extension of "f-strings" from PEP 498 which enables Python developers to create and use their own custom tags (or prefixes) when working with string literals and any interpolation. Tag strings are based on a related idea in JavaScript, tagged template literals but with a Pythonic syntax for both the use of and the definition of tags.
$ path/to/venv/bin/pip install -e .