This PEP introduces tag strings for custom, repeatable string processing. Tag strings
are an extension to f-strings, with a custom function -- the "tag" -- in place of the
f prefix. This function can then provide rich features such as safety checks, lazy
evaluation, domain specific languages (DSLs) for web templating, and more.
Tag strings are similar to JavaScript tagged templates <https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#tagged_templates>_
and similar ideas in other languages.
To keep the conversation here focused on the PEP, we moved supporting material to a companion repo. There you can find resources such as:
- JupyterLite playground for tag strings
- Docker builds
- Long-form tutorials
- Example code