Re: [Python-Dev] A wart which should have been repaired in 3.0?

At 09:30 PM 12/30/2008 -0500, rdmurray@bitdance.com wrote:

On Tue, 30 Dec 2008 at 17:51, Phillip J. Eby wrote:

...

At 02:32 PM 12/30/2008 -0800, Scott David Daniels wrote:

...

More trouble with the "just take the dirname":

 paths = ['/a/b/c', '/a/b/d', '/a/b']
 os.path.dirname(os.path.commonprefix([
                     os.path.normpath(p) for p in paths]))

give '/a', not '/a/b'.

...because that's the correct answer.

But not the answer that is wanted.

So the challenge now is to write a single expression that will yield '/a/b' when passed the above paths list, and also produce '/a/b' when passed the following paths list:

paths = ['/a/b/c', '/a/b/cd']

Change that to [os.path.normpath(p)+'/' for p in paths] and you've got yourself a winner.