Message 257657 - Python tracker

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Author	vstinner
Recipients	benhoyt, ethan.furman, gvanrossum, pitrou, serhiy.storchaka, vstinner
Date	2016-01-06.23:03:57
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1452121437.47.0.436078655626.issue26032@psf.upfronthosting.co.za>
In-reply-to

Content
> As I recall, if the platform's DirEntry doesn't provide the cacheable attributes when first called, those attributes will be looked up (and cached) on first access. scandir() is not magic. It simply provides info given by the OS: see readdir() on UNIX and FindFirstFile()/FindNextFile() on Windows. DirEntry calls os.stat() if needed, but it caches the result. DirEntry doc tries to explain when syscalls or required or not, depending on the requested information and the platform: https://docs.python.org/dev/library/os.html#os.DirEntry

> As I recall, if the platform's DirEntry doesn't provide the cacheable attributes when first called, those attributes will be looked up (and cached) on first access.

scandir() is not magic. It simply provides info given by the OS: see readdir() on UNIX and FindFirstFile()/FindNextFile() on Windows.

DirEntry calls os.stat() if needed, but it caches the result.

DirEntry doc tries to explain when syscalls or required or not, depending on the requested information and the platform:
https://docs.python.org/dev/library/os.html#os.DirEntry

History
Date	User	Action	Args
2016-01-06 23:03:57	vstinner	set	recipients: + vstinner, gvanrossum, pitrou, benhoyt, ethan.furman, serhiy.storchaka
2016-01-06 23:03:57	vstinner	set	messageid: <1452121437.47.0.436078655626.issue26032@psf.upfronthosting.co.za>
2016-01-06 23:03:57	vstinner	link	issue26032 messages
2016-01-06 23:03:57	vstinner	create