[Python-Dev] Defining a path protocol (original) (raw)

Ethan Furman ethan at stoneleaf.us
Fri Apr 8 12:36:03 EDT 2016

On 04/08/2016 09:04 AM, Chris Barker wrote:

On Fri, Apr 8, 2016 at 2:50 AM, Nick Coghlan wrote:

Method, as long as there's a helper function somewhere what has the helper function got to do with whether it's a method or attribute (would we call a property an attribute here?)

Built-in? (name is dependent on #1 if we add one) os.fspath (alongside os.fsencode and os.fsdecode) [...] this is only going to be used by the stdlib and other path-using libraries, not user code -- is that that hard to call obj.fspath() ?

  1. user code may call it
  2. folks who write libraries are still users ;)
  3. using __dunder__s directly is usually poor form.

I thought the whole point off all this is that not any old string can be a path! (whereas any int can be an index). Unless we go with Chris A's suggestion that this be a more generic lossless string protocol, rather than just for paths.

That does seem to be a valid point against str.fspath.

-- Ethan

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