It's not confusing... it's sarcastic. I don't believe adding literally a third string interpolation method to a language is generally justified, and honestly you can consider it a fourth if you think, as I do, that even "my string " + val + " etc." is itself an interpolation language, especially when combined with things like __str__. I'm afraid you fed me a straight line I couldn't resist; it's not really an answer to you.
It's not confusing... it's sarcastic. I don't believe adding literally a third string interpolation method to a language is generally justified, and honestly you can consider it a fourth if you think, as I do, that even "my string " + val + " etc." is itself an interpolation language, especially when combined with things like __str__. I'm afraid you fed me a straight line I couldn't resist; it's not really an answer to you.