This template language is only superficially the same, but the code between the <% and %> would need to be python in this version, not JS, so you can't actually

This template language is only superficially the same, but the code between the <% and %> would need to be python in this version, not JS, so you can't actually share anything. You would need to combine something like this with a JS-to-Python transpiler for that to work.