Python 3.15 released: Lazy imports, UTF-8 and new data types

Python 3.15 is expected to speed up some programs and simplifies handling immutable data. UTF-8 as standard requires testing.
Ars Technica

Help with writing a UTF-8 text file and getting it automatically recognised as UTF-8

I'm working on a program that is writing a UTF-8 text file. This process works fine. What doesn't work fine is that TextEdit.app (and others) does not recognise it automatically as a UTF-8 text file, ...