Bugs item #516232, was opened at 2002-02-11 19:50
Message generated for change (Comment added) made by facundobatista
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Category: Extension Modules
Group: Python 2.2
>Status: Closed
>Resolution: Wont Fix
Priority: 5
Submitted By: Charles I. Fuller (cifuller)
Assigned to: Nobody/Anonymous (nobody)
Summary: Windows os.path.isdir bad if drive only
Initial Comment:
It seems that most os functions recognize the Windows
drive letter without a directory as the current
directory on the drive, but os.path.isdir still
returns 0. If os.listdir('C:') returns data,
os.path.isdir('C:') should return 1 for consistency.
C:\folder_on_C>python
Python 2.2 (#28, Dec 21 2001, 12:21:22) [MSC 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or
"license" for
more information.
>>> import os
>>> os.system('dir C:')
Volume in drive C has no label.
Volume Serial Number is E4C9-AD16
Directory of C:\folder_on_C
02/11/2002 05:29p <DIR> .
02/11/2002 05:29p <DIR> ..
02/11/2002 05:29p <DIR> subA
02/11/2002 05:29p <DIR> subB
0 File(s) 0 bytes
4 Dir(s) 22,126,567,424 bytes free
0
>>> os.listdir('C:')
['subA', 'subB']
>>> os.path.abspath('C:')
'C:\folder_on_C'
>>> os.path.isdir('C:')
0
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Comment By: Facundo Batista (facundobatista)
Date: 2005-05-30 15:00
Message:
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Deprecated. Reopen only if still happens in 2.3 or newer.
. Facundo
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Comment By: Facundo Batista (facundobatista)
Date: 2005-03-21 16:30
Message:
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Please, could you verify if this problem persists in Python 2.3.4
or 2.4?
If yes, in which version? Can you provide a test case?
If the problem is solved, from which version?
Note that if you fail to answer in one month, I'll close this bug
as "Won't fix".
Thank you!
. Facundo
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Comment By: Tim Peters (tim_one)
Date: 2002-02-12 19:33
Message:
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Well, the underlying Microsoft routines are themselves
inconsistent, and in undocumented ways. We make a mild
effort to hide their warts, but it's historical truth that
doing so introduces other bugs. The sad fact is that MS
stat() insists "C:" does not exist, but the MS
FindFirstFile happily accepts "C:". If you think *you* can
straigten this inherited mess out, happy to accept a patch
<wink>.
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Comment By: Charles I. Fuller (cifuller)
Date: 2002-02-12 18:54
Message:
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Responding to Tim's followup...
In this case the 'C:' is not the root drive, it is the
current dir on that drive. I noticed that os.path.abspath
was updated between 2.0 and 2.2 to recognize the current
dir.
It's an inconsistency that tripped me up already.
>>> os.path.isdir('C:')
0
>>> os.path.isdir(os.path.abspath('C:'))
1
The listdir has been working with drive specs (recognizing
the current dir) for a while. The abspath code must be
handling the drive-only input as a special case. The isdir
function should do the same for consistency.
There should at least be a warning in the docs...
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Comment By: Tim Peters (tim_one)
Date: 2002-02-11 20:16
Message:
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Sorry, this is how Microsoft's implementation of the
underlying stat() function works. "Root drive" paths must
be given with a trailing slash or backslash, else MS stat()
claims they don't exist. You'll see the same irritating
behavior in C code. Attempts to worm around it in the past
have introduced other bugs; see bug 513572 for a current
example.
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