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Thu Dec 2 10:32:19 CET 2010 · https://mail.python.org/pipermail/python-dev/2010-December/106259.html

On Thu, Dec 2, 2010 at 5:05 PM, terry.reedy <python-checkins at python.org> wrote:
> +   If
> +   the target directory with the same mode as we specified already exists,
> +   raises an :exc:`OSError` exception if *exist_ok* is False, otherwise no
> +   exception is raised.  If the directory cannot be created in other cases,
> +   raises an :exc:`OSError` exception.

I would suggest being explicit here that "directory exists, but has a
mode other than the one requested" always triggers an exception.
Perhaps something like the following:

"Raises an :exc:`OSError` exception if the target directory already
exists, unless *exist_ok* is True and the existing directory has the
same mode as is specified in the current call.  Also raises an
:exc:`OSError` exception if the directory cannot be created for any
other reason."

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia

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[Python-Dev] [Python-checkins] r86930 - in python/branches/py3k: Doc/library/os.rst Lib/os.py Lib/test/test_os.py Misc/ACKS Misc/NEWS