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Fri May 1 07:41:16 CEST 2009 · http://mail.python.org/pipermail/python-dev/2009-May/089311.html

On 30 Apr, 2009, at 21:33, Piet van Oostrum wrote:

>>>>>> Ronald Oussoren <ronaldoussoren at mac.com> (RO) wrote:
>
>> RO> For what it's worth, the OSX API's seem to behave as follows:
>> RO> * If you create a file with an non-UTF8 name on a HFS+  
>> filesystem the
>> RO> system automaticly encodes the name.
>
>> RO> That is,  open(chr(255), 'w') will silently create a file named  
>> '%FF'
>> RO> instead of the name you'd expect on a unix system.
>
> Not for me (I am using Python 2.6.2).
>
>>>> f = open(chr(255), 'w')
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
> IOError: [Errno 22] invalid mode ('w') or filename: '\xff'
>>>>

That's odd. Which version of OSX do you use?

ronald at Rivendell-2[0]$ sw_vers
ProductName:	Mac OS X
ProductVersion:	10.5.6
BuildVersion:	9G55

[~/testdir]
ronald at Rivendell-2[0]$ /usr/bin/python
Python 2.5.1 (r251:54863, Jan 13 2009, 10:26:13)
[GCC 4.0.1 (Apple Inc. build 5465)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> import os
 >>> os.listdir('.')
[]
 >>> open(chr(255), 'w').write('x')
 >>> os.listdir('.')
['%FF']
 >>>

And likewise with python 2.6.1+ (after cleaning the directory):

[~/testdir]
ronald at Rivendell-2[0]$ python2.6
Python 2.6.1+ (release26-maint:70603, Mar 26 2009, 08:38:03)
[GCC 4.0.1 (Apple Inc. build 5493)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> import os
 >>> os.listdir('.')
[]
 >>> open(chr(255), 'w').write('x')
 >>> os.listdir('.')
['%FF']
 >>>

>
> I once got a tar file from a Linux system which contained a file  
> with a
> non-ASCII, ISO-8859-1 encoded filename. The tar file refused to be
> unpacked on a HFS+ filesystem.
> -- 
> Piet van Oostrum <piet at cs.uu.nl>
> URL: http://pietvanoostrum.com [PGP 8DAE142BE17999C4]
> Private email: piet at vanoostrum.org

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[Python-Dev] PEP 383: Non-decodable Bytes in System Character Interfaces