[Python-Dev] Remaining decisions on PEP 471 -- os.scandir()

Ethan Furman ethan at stoneleaf.us
Tue Jul 15 05:00:51 CEST 2014

On 07/14/2014 07:48 PM, Ben Hoyt wrote:
> In any case, here's the modified proposal:
> scandir(path='.') -> generator of DirEntry objects, which have:
> * name: name as per listdir()
> * full_name: full path name (not necessarily absolute), equivalent of
> os.path.join(path, entry.name)
> * is_dir(follow_symlinks=True): like os.path.isdir(entry.full_name),
> but free in most cases; cached per entry
> * is_file(follow_symlinks=True): like os.path.isfile(entry.full_name),
> but free in most cases; cached per entry
> * is_symlink(): like os.path.islink(), but free in most cases; cached per entry
> * stat(follow_symlinks=True): like os.stat(entry.full_name,
> follow_symlinks=follow_symlinks); cached per entry
> The above may not be quite perfect, but it's good, and I think there's
> been enough bike-shedding on the API. :-)

Looks doable.  Just make sure the cached entries reflect the 'follow_symlinks' setting -- so a symlink could end up with 
both an lstat cached entry and a stat cached entry.


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