I believe that in order to edit, you'd submit a pull request to https://github.com/BitEU/Buy. Someone else has recently done just that.

A cheeky answer: whenever Ruff/flake8-type-checking tells me to. Though I'd only enable that check now that there's an autofix in Ruff as well.

The link is to a person's Mastodon post advertising their own blog post. Here's a direct link to that blog post: https://rednafi.com/python/escape_template_pattern/