[Python-Dev] os.path.normcase rationale? (original) (raw)

Dan Villiom Podlaski Christiansen danchr at gmail.com
Sun Oct 3 15🔞39 CEST 2010

On 3 Oct 2010, at 02:35, Nir Soffer wrote:

On Sat, Sep 25, 2010 at 1:36 AM, James Y Knight <foom at fuhm.net> wrote:

An OSX code sketch is available here (summary: call FSPathMakeRef to get an FSRef from a path string, then FSRefMakePath to make it back into a path, which will then have the correct case). And note that it only works if the file actually exists.

http://stackoverflow.com/questions/370186/how-do-i-find-the-correct-case-of-a-filename It would indeed be useful to have that be available in Python. There is a much simpler way: from Carbon import File File.FSRef('/tmp/foo').aspathname() '/private/tmp/Foo' Note that this is much slower compared to os.path.exists.

This won't work in py3k; the Carbon modules were removed in 3.0. A
simpler alternative would probably be the F_GETPATH fcntl. An example:

Python 3.1.2 (r312:79147, Jul 11 2010, 18:21:56) [GCC 4.2.1 (Apple Inc. build 5664)] on darwin Type "help", "copyright", "credits" or "license" for more information.

from fcntl import fcntl from os.path import basename, exists from os import remove

F_GETPATH = 50

if exists('/tmp/Ã¥'): ... remove('/tmp/Ã¥') ... open('/tmp/Ã¥', 'w').close() f = open(b'/tmp/A\xcc\x8a')

a = f.name b = fcntl(f, F_GETPATH, b'\0' * 1024).rstrip(b'\0')

a, b (b'/tmp/A\xcc\x8a', b'/private/tmp/\xc3\xa5') a.decode('utf-8'), b.decode('utf-8') ('/tmp/Ã…', '/private/tmp/Ã¥')

--

Dan Villiom Podlaski Christiansen danchr at gmail.com

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