[Python-ideas] Dunder method to make object str-like

[Chris Barker]

On Thu, Apr 7, 2016 at 11:59 AM, Brett Cannon <brett at python.org> wrote:

>   class StringLike(abc.ABC):
>
>     @abstractmethod
>     def __str__(self):
>         """Return the string representation of something."""
>
>   StringLike.register(pathlib.PurePath)  # Any 3rd-party library can do
> the same.
>
> You could also call the class StringablePath or something and get the
> exact same concept across where you are using the registration abilities of
> ABCs to semantically delineate when a class's __str__() returns a usable
> file path.
>
> The drawback is that this isn't easily backported like `path.__ospath__()
> if hasattr(path, '__ospath__') else path` for libraries that don't
> necessarily have access to pathlib but want to be compatible with accepting
> path objects.
>

and a plus is that it's compatible with type hinting -- is that the future
of Python???


-CHB


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Christopher Barker, Ph.D.
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