Changing filenames from Greeklish => Greek (subprocess complain)

[Νικόλαος Κούρας]

Τη Κυριακή, 9 Ιουνίου 2013 12:14:12 μ.μ. UTC+3, ο χρήστης Νικόλαος Κούρας έγραψε:
> Τη Κυριακή, 9 Ιουνίου 2013 11:15:07 π.μ. UTC+3, ο χρήστης Steven D'Aprano έγραψε:
> 
> 
> 
> > Please try this: log into the Linux server, and then start up a Python 
> 
> 
> 
> > import os, sys 
> 
> > print(sys.version)
> 
> > s = ('\N{GREEK SMALL LETTER ALPHA}\N{GREEK SMALL LETTER BETA}' 
> 
> >      '\N{GREEK SMALL LETTER GAMMA}\N{GREEK SMALL LETTER DELTA}' 
> 
> >      '\N{GREEK SMALL LETTER EPSILON}')
> 
> > print(s)
> 
> > filename = '/tmp/' + s
> 
> > open(filename, 'w')
> 
> > os.path.exists(filename)
> 
> 
> 
> > Copy and paste the results back here please.
> 
> 
> 
> Of course: here it is:
> 
> 
> 
> root at nikos [/home/nikos/www/cgi-bin]# python
> 
> Python 3.3.2 (default, Jun  3 2013, 16:18:05)
> 
> [GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux
> 
> Type "help", "copyright", "credits" or "license" for more information.
> 
> >>> import os, sys
> 
> >>> print(sys.version)
> 
> 3.3.2 (default, Jun  3 2013, 16:18:05)
> 
> [GCC 4.4.7 20120313 (Red Hat 4.4.7-3)]
> 
> >>> s = ('\N{GREEK SMALL LETTER ALPHA}\N{GREEK SMALL LETTER BETA}'
> 
> ...      '\N{GREEK SMALL LETTER GAMMA}\N{GREEK SMALL LETTER DELTA}'
> 
> ...      '\N{GREEK SMALL LETTER EPSILON}')
> 
> print(s)
> 
> >>> αβγδε
> 
> >>> filename = '/tmp/' + s
> 
> >>> open(filename, 'w')
> 
> <_io.TextIOWrapper name='/tmp/αβγδε' mode='w' encoding='UTF-8'>
> 
> >>> os.path.exists(filename)
> 
> True
> 
> >>>

I dont much but it lloks correct to me, but then agian why this error?