[Python-Dev] Windows: Remove support of bytes filenames in the os module? (original) (raw)

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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