[Python-Dev] proposed os.fspath() change

[Ethan Furman]

On 06/15/2016 12:10 PM, Koos Zevenhoven wrote:
>>>      if isinstance(filename, os.PathLike):
>
> By the way, regarding the line of code above, is there a convention
> regarding whether implementing some protocol/interface requires
> registering with (or inheriting from) the appropriate ABC for it to
> work in all situations. IOW, in this case, is it sufficient to
> implement __fspath__ to make your type pathlike? Is there a conscious
> trend towards requiring the ABC?

The ABC is not required, simply having the __fspath__ attribute is 
enough.  Of course, to actually work that attribute should be a function 
that returns a str or bytes object.  ;)

--
~Ethan~