[Python-ideas] PEP 428 - object-oriented filesystem paths

[MRAB]

On 2012-10-12 20:42, Antoine Pitrou wrote:
> On Fri, 12 Oct 2012 12:23:46 -0700
> Ethan Furman <ethan at stoneleaf.us> wrote:
>>
>> Which is why I would like to see Path based on str, despite Guido's
>> misgivings.  (Yes, I know I'm probably tilting at windmills here...)
>>
>> If Path is string based we get backwards compatibility with all the os
>> and third-party tools that expect and use strings; this would allow a
>> gentle migration to using them, as opposed to the all-or-nothing if Path
>> is a completely new type.
>
> It is not all-or-nothing since you can just call str() and it will work
> fine with both strings and paths.
>
The disadvantage of using str is that it will also convert non-path
objects to strings, possibly changing the result of the call:

 >>> os.path.isdir(1)
Traceback (most recent call last):
   File "<pyshell#6>", line 1, in <module>
     os.path.isdir(1)
TypeError: 'int' does not support the buffer interface
 >>> os.path.isdir(str(1))
False