Yes that makes sense, thanks. Also, my comment was about the amount of boilerplate required, but that can be vastly reduced by writing `process_template` in a

Yes that makes sense, thanks. Also, my comment was about the amount of boilerplate required, but that can be vastly reduced by writing `process_template` in a more functional style instead of the highly-imperative (Golang-like?) style used in the article. The first `process_template` example is just: def process_template(template: Template) -> str: return ''.join(interleave_longest(template.strings, map(process_value, template.values))) And the second is something like: def process_template(template: Template) -> tuple[str, tuple]: return ( ''.join(interleave_longest(template.strings, ['?'] * len(template.values))), map(process_value, template.values) )