[Python-Dev] Pathlib enhancements - acceptable inputs and outputs for __fspath__ and os.fspath()

[Paul Moore]

On 13 April 2016 at 14:51, Nick Coghlan <ncoghlan at gmail.com> wrote:
> The potentially SE-strings only come back when you pass str, and the
> operating system data isn't properly encoded according to the nominal
> filesystem encoding. They round trip nicely to other operating system
> APIs, but can indeed be a problem if they escape to other parts of
> your program

If the operating system APIs handle SE-strings correctly, is it not
acceptable to require the fspath protocol to return strings, and then
places like DirEntry or Ethan's module, when they want to return
bytes, can just SE-encode the bytes and return those?

Or will the fspath protocol be used at a low enough level that it's
*below* the point where SE-encoded strings are handled properly?

Paul