On Mon, 25 Nov 2013 12:04:28 +1300 Ben Hoyt <benh...@gmail.com> wrote: > > Right now, pathlib doesn't cache. Guido decided it was safer to start > > off like that, and perhaps later we can add some optional caching. > > > > One reason caching didn't go in is that it's not clear which API is > > best. Working on pluggin scandir() into pathlib would actually help > > choosing a stat-caching API. > > > > (or, rather, lstat-caching...) > > > >> The other related thing is that DirEntry only provides .lstat(), > >> because it's providing stat-like info without following links. > > > > Path.is_dir() and friends use stat(), i.e. they inform you about > > whether a symlink's target is a directory (not the symlink itself). Of > > course, if the DirEntry says the path is a symlink, Path.is_dir() could > > then run stat() to find out about the target. > > > > Do you plan to propose scandir() for inclusion in the stdlib? > > Yes, I was hoping to propose adding "os.scandir() -> yields DirEntry > objects" for inclusion into the stdlib, and also speed up os.walk() as > a result. > > However, pathlib's API with .is_dir() and .lstat() etc are so close to > DirEntry, I'd be much keener to roll up the scandir functionality into > pathlib's iterdir(), as that's already going in the standard library, > and iterdir() already returns Path objects.
We could still expose scandir() as a low-level API, *and* call it in pathlib for optimizations. > We could do Path.lstat(cached=True), but we'd also really want > is_dir(cached=True), so that API kinda sucks. Alternatively you could > have iterdir(cached=True) return PathWithCachedStat style objects -- > probably better, but kinda messy. Perhaps Path.enable_caching()? It would enable caching not only on this path objects, but all objects constructed from it. Regards Antoine. _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
