Don't think I was using any of these removed things, and it all sounds sensible looking at the fuller list at https://docs.python.org/dev/whatsnew/3.12.html#rem

Don't think I was using any of these removed things, and it all sounds sensible looking at the fuller list at https://docs.python.org/dev/whatsnew/3.12.html#removed https://docs.python.org/dev/whatsnew/3.12.html#removed > Remove the filename attribute of gzip.GzipFile, deprecated since Python 2.6, use the name attribute instead. 2.6 wow, that's some compatibility right there. About time that got removed then! Either that or undeprecate it, if it's fine to use. Any decision at this point is a good one.