[Python-Dev] pathlib (PEP 428) status (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Thu Oct 24 14:14:39 CEST 2013

On 24 October 2013 18:17, Antoine Pitrou <solipsis at pitrou.net> wrote:

Le Thu, 24 Oct 2013 00:38:02 +0200, Christian Heimes <christian at python.org> a écrit :

Am 23.10.2013 23:37, schrieb Charles-François Natali: > Hi, > > What's the current status of pathlib? Is it targeted for 3.4? > > It would be a really nice addition, and AFAICT it has already been > maturing a while on pypi, and discussed several times here. > If I remember correctly, the only remaining issue was stat()'s > result caching.

Hi, I'd like to see pathlib in 3.4 as well. Last week at PyCon.DE in Cologne several people have asked me about pathlib. We even had a BarCamp session about path libraries for Python. A couple of German Python users have promised to contribute doc improvements soonish. AFAIK stat caching and a os.listdir() generator with stat recycling (dirent->dtype) are open issues. I suggest Python 3.4 should ignore these features for now but prepare the API and documentation for future enhancements. Thanks for the push. I have to cleanup / remove stat caching from the PEP (not sure yet which one, Nick expressed interest during the last discussion) and then polish it for pronouncement.

A clean stat caching mechanism would potentially help resolve an architectural problem with walkdir (https://pypi.python.org/pypi/walkdir), where offering stat-based filtering as a pipeline of independent iterators would significantly increase the number of stat calls compared to doing such filtering directly outside the iterator.

However, since walkdir doesn't currently offer such stat-based filters, and it's unlikely I'll be adding it any time soon, deferring a stat caching design sounds like a reasonable idea to me.

Still, I need to find someone to pronounce on it.

I'd offer, but I already have a scary number of things I need to get done by beta 1 :P

Cheers, Nick.

-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia

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