On 8 Jul 2014, at 15:52, Ben Hoyt wrote:
Hi folks,
After some very good python-dev feedback on my first version of PEP
471, I've updated the PEP to clarify a few things and added various
"Rejected ideas" subsections. Here's a link to the new version (I've
also copied the full text below):
http://legacy.python.org/dev/peps/pep-0471/ -- new PEP as HTML
http://hg.python.org/peps/rev/0da4736c27e8 -- changes
[...]
Rejected ideas
==============
[...]
Return values being pathlib.Path objects
----------------------------------------
With Antoine Pitrou's new standard library ``pathlib`` module, it
at first seems like a great idea for ``scandir()`` to return instances
of ``pathlib.Path``. However, ``pathlib.Path``'s ``is_X()`` and
``lstat()`` functions are explicitly not cached, whereas ``scandir``
has to cache them by design, because it's (often) returning values
from the original directory iteration system call.
And if the ``pathlib.Path`` instances returned by ``scandir`` cached
lstat values, but the ordinary ``pathlib.Path`` objects explicitly
don't, that would be more than a little confusing.
Guido van Rossum explicitly rejected ``pathlib.Path`` caching lstat in
the context of scandir `here
<https://mail.python.org/pipermail/python-dev/2013-November/130583.html>`_,
making ``pathlib.Path`` objects a bad choice for scandir return
values.
Can we at least make sure that attributes of DirEntry that have the same
meaning as attributes of pathlib.Path have the same name?
[...]
Servus,
Walter
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