Le mardi 8 juillet 2014, Ben Hoyt <benh...@gmail.com> a écrit : > > > It is not clear to me which methods share the cache. > > > > On UNIX, is_dir() and is_file() call os.stat(); whereas lstat() and > > is_symlink() call os.lstat(). > > > > If os.stat() says that the file is not a symlink, I guess that you can > > use os.stat() result for lstat() and is_symlink() methods? > > > > In the worst case, if the path is a symlink, would it be possible that > > os.stat() and os.lstat() become "inconsistent" if the symlink is > > modified between the two calls? If yes, I don't think that it's an > > issue, it's just good to know it. > > > > For symlinks, readdir() returns the status of the linked file or of the > symlink? > > I think you're misunderstanding is_dir() and is_file(), as these don't > actually call os.stat(). All DirEntry methods either call nothing or > os.lstat() to get the stat info on the entry itself (not the > destination of the symlink).
Oh. Extract of your PEP: "is_dir(): like os.path.isdir(), but much cheaper". genericpath.isdir() and genericpath.isfile() use os.stat(), whereas posixpath.islink() uses os.lstat(). Is it a mistake in the PEP? > In light of this, I don't think what you're describing above is an issue. I'm not saying that there is an issue, I'm just trying to understand. Victor
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