Your linter can flag the type mismatch, and/or the function can reject f"" at runtime. This is because t"" yields a Template, not a str. Template is also more

Your linter can flag the type mismatch, and/or the function can reject f"" at runtime. This is because t"" yields a Template, not a str. Template is also more powerful/concise in that the stringify function can handle the "formatting" args however it looks. Note also, that there's no requirement that the template ever become a str to be used.