Interesting! Indeed, please create an issue and post a link here.
>From a quick look at the code, I can't see any obvious bugs here, the info
seems to be coming directly from FindNextFileW. This will likely require
some more digging.
On Sun, Oct 18, 2020 at 7:37 AM Gregory P. Smith <g...@krypto.org> wrote:
> Could you please file this as an issue on bugs.python.org?
>
> Thanks!
> -Greg
>
>
> On Sat, Oct 17, 2020 at 7:25 PM Rob Cliffe via Python-Dev <
> python-dev@python.org> wrote:
>
>>
>> TLDR: In os.scandir directory entries, atime is always a copy of mtime
>> rather than the actual access time.
>>
>> Demo program: Windows 10, Python 3.8.3:
>>
>> # osscandirtest.py
>> import time, os
>> with open('Test', 'w') as f: f.write('Anything\n') # Write to a file
>> time.sleep(10)
>> with open('Test', 'r') as f: f.readline() # Read the file
>> print(os.stat('Test'))
>> for DirEntry in os.scandir('.'):
>> if DirEntry.name == 'Test':
>> stat = DirEntry.stat()
>> print(f'scandir DirEntry {stat.st_ctime=} {stat.st_mtime=}
>> {stat.st_atime=}')
>>
>> Sample output:
>>
>> os.stat_result(st_mode=33206, st_ino=8162774324687317,
>> st_dev=2230120362, st_nlink=1, st_uid=0,
>> st_gid=0, st_size=10, st_atime=1600631381, st_mtime=1600631371,
>> st_ctime=1600631262)
>> scandir DirEntry stat.st_ctime=1600631262.951019
>> stat.st_mtime=1600631371.7062848 stat.st_atime=1600631371.7062848
>>
>> For os.stat, atime is 10 seconds more than mtime, as would be expected.
>> But for os.scandir, atime is a copy of mtime.
>> ISTM that this is a bug, and in fact recently it stopped me from using
>> os.scandir in a program where I needed the access timestamp. No big
>> deal, but ...
>> If it is a feature for some reason, presumably it should be documented.
>>
>> Best wishes
>> Rob Cliffe
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