Now this is an interesting #Python problem. I don't know if it's a #bug, but it's a change in behaviour that I don't see documented.
I upgraded from #Debian 12/Bookworm to 13/Trixie, so the default Python3 changed from 3.11 to 3.13. A script of mine broke, because `pathlib.Path.is_mount()` changed behaviour when the path is a symlink (at least to a directory).
i.e. I'm testing a path that is a symlink. The symlink points to a directory. That directory *is* a mountpoint. The `.is_mount()` test in 3.11 returned True, while in 3.13 it returns False.
This seems wrong to me. Most path-manipulation functions transparently treat symlinks as if they were the pointed-to object unless you pass an option/flag specifically to say you want the symlink itself.
Gonna have to dig to see what else I can find.
#pathlib #path #is_mount #stdlib #behaviour #symlink #filesystem #mountpoint #mount

