Bugs item #1580472, was opened at 2006-10-19 11:44
Message generated for change (Comment added) made by potten
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Category: Python Library
Group: Python 2.5
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Koblaid (koblaid)
Assigned to: Nobody/Anonymous (nobody)
Summary: glob.glob("c:\\[ ]\*) doesn't work
Initial Comment:
OS: Windows 2000 Service Pack 4
Python 2.5
glob.glob() doesn't work in directories named
"[ ]" (with a blank in it). Another example is a
directory named "A - [Aa-Am]"
Example:
#########################
C:\>md []
C:\>md "[ ]"
C:\>copy anyfile.txt []
1 Datei(en) kopiert.
C:\>copy anyfile.txt "[ ]"
1 Datei(en) kopiert.
C:\>python
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC
v.1310 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for
more information.
>>> import glob
>>> glob.glob ("c:\\[]\*")
['c:\\[]\\anyfile.txt']
>>> glob.glob ("c:\\[ ]\*")
[]
#########################
The second glob should have resulted the same as the
first glob since I copied the same file to both
directories.
I may be wrong because I'm new to python. But I've
tested it a couple of times, and I think it have to be
a bug of python or a bug of windows.
Greets, Koblaid
----------------------------------------------------------------------
Comment By: Peter Otten (potten)
Date: 2006-10-27 12:32
Message:
Logged In: YES
user_id=703365
Not a bug. "[abc]" matches exactly one character which may be "a", "b" or "c".
Therefore "[ ]" matches one space character. If you want a literal "[", put it
in brackets,
e. g. glob.glob("C:\\[[] ]\\*").
---
By the way, do you think this problem is common enough to warrant the addition
of a
fnmatch.escape() function? I have something like this in mind:
>>> import re
>>> r = re.compile("(%s)" % "|".join(re.escape(c) for c in "*?["))
>>> def escape(s):
... return r.sub(r"[\1]", s)
...
>>> escape("c:\\[a-z]\\*")
'c:\\[[]a-z]\\[*]'
----------------------------------------------------------------------
Comment By: Josiah Carlson (josiahcarlson)
Date: 2006-10-27 06:14
Message:
Logged In: YES
user_id=341410
This is a known issue with the fnmatch module (what glob
uses under the covers). According to the documentation of
the translate method that converts patterns into regular
expressions... "There is no way to quote meta-characters."
The fact that "[]" works but "[ ]" doesn't work is a
convenient bug, for those who want to use "[]".
If you can come up with some similar but non-ambiguous
syntax to update the fnmatch module, I'm sure it would be
considered, but as-is, I can't see this as a "bug" per-se.
----------------------------------------------------------------------
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