On Apr 13 2016, Ethan Furman <et...@stoneleaf.us> wrote:
> On 04/13/2016 03:45 PM, Nikolaus Rath wrote:
>
>> When passing an object that is of type str and has a __fspath__
>> attribute, all approaches return the value of __fspath__().
>>
>> However, when passing something of type bytes, the second approach
>> returns the object, while the third returns the value of __fspath__().
>>
>> Is this intentional? I think a __fspath__ attribute should always be
>> preferred.
>
> Yes, it is intentional. The second approach assumes __fspath__ can
> only contain str, so there is no point in checking it for bytes.
Either I haven't understood your answer, or you haven't understood my
question. I'm concerned about this case:
class Special(bytes):
def __fspath__(self):
return 'str-val'
obj = Special('bytes-val', 'utf8')
path_obj = fspath(obj, allow_bytes=True)
With #2, path_obj == 'bytes-val'. With #3, path_obj == 'str-val'.
I would expect that fspath(obj, allow_bytes=True) == 'str-val' (after
all, it's allow_bytes, not require_bytes). Bu
Best,
-Nikolaus
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