Issue 28041: Inconsistent behavior: Get st_nlink from os.stat() and os.scandir() (original) (raw)
Created on 2016-09-09 09:24 by Mohanson Leaf, last changed 2022-04-11 14:58 by admin. This issue is now closed.
Messages (3)
Author: Mohanson Leaf (Mohanson Leaf)
Date: 2016-09-09 09:24
os.stat(file).st_nlink gives 1 but same file's st_nlink from os.scandir(dir) gives 0.
""" Inconsistent behavior: Get st_nlink from os.stat() and os.scandir() Platform: Python 3.5.1 (v3.5.1:37a07cee5969, Dec 6 2015, 01:38:48) [MSC v.1900 32 bit (Intel)] on win32 """
import os import os.path
print('os.stat:', os.stat(file).st_nlink)
for entry in os.scandir(os.path.dirname(os.path.abspath(file))): if entry.name == 'stat.py': print('os.scandir:', entry.stat().st_nlink)
""" os.stat: 1 os.scandir: 0 """
Author: Josh Rosenberg (josh.r) * 
Date: 2017-03-24 00:58
This is documented behavior. Per the docs for os.DirEntry's stat method (the objects yielded by os.scandir):
On Windows, the st_ino, st_dev and st_nlink attributes of the stat_result are always set to zero. Call os.stat() to get these attributes.
It might be nice if those values could be cached on read (through a lazily initialized value on property access or the like), but this is not a bug, it's working as documented.
Author: STINNER Victor (vstinner) * 
Date: 2017-04-21 23:46
scandir () is designed for effiency, not for portability or correctness. The API has deliberate limitations which are well documented, as the one you spotted: https://docs.python.org/dev/library/os.html#os.DirEntry.stat
Your PR would defeat the whole purpose of scandir.
History
Date
User
Action
Args
2022-04-11 14:58:36
admin
set
github: 72228
2017-04-21 23:46:00
vstinner
set
status: open -> closed
nosy: + vstinner
messages: +
resolution: not a bug
stage: resolved
2017-03-24 00:58:30
josh.r
set
nosy: + josh.r
messages: +
2017-03-23 23:01:53
mark.becwar
set
pull_requests: + <pull%5Frequest700>
2016-09-09 09:24:54
Mohanson Leaf
create