[Python-Dev] Windows: Remove support of bytes filenames in the os module?
Victor Stinner
victor.stinner at gmail.com
Tue Feb 9 04:22:29 EST 2016
2016-02-09 1:37 GMT+01:00 eryk sun <eryksun at gmail.com>:
> For example, in codepage 932 (Japanese), it's an error if a lead byte
> (i.e. 0x81-0x9F, 0xE0-0xFC) is followed by a trailing byte with a
> value less than 0x40 (note that ASCII 0-9 is 0x30-0x39, so this is not
> uncommon). In this case the ANSI API substitutes the default character
> for Japanese, '・' (U+30FB, Katakana middle dot).
>
> >>> locale.getpreferredencoding()
> 'cp932'
> >>> open(b'\xe05', 'w').close()
> >>> os.listdir('.')
> ['・']
> >>> os.listdir(b'.')
> [b'\x81E']
>
> All invalid sequences get mapped to '・', which roundtrips as
> b'\x81\x45', so you can't reliably create and open files with
> arbitrary bytes paths in this locale.
Oh, and I forgot to ask: what is your filesystem? Is it the same
behaviour for NTFS, FAT32, network shared directories, etc.?
Victor
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