[Python-3000] New proposition for Python3 bytes filename issue

[Terry Reedy]

Terry Reedy wrote:
> Guido van Rossum wrote:

>> I'm not sure either way. I've heard it claim that Windows filesystem
>> APIs use Unicode natively. Does Python 3.0 on Windows currently
>> support filenames expressed as bytes? Are they encoded first before
>> passing to the Unicode APIs? Using what encoding?

 > [os.listdir(bytes) returns list of bytes, open(bytes) fails]

More:

The path functions seem also do not work:

 >>> op.abspath(b'tem')
...
     path = path.replace("/", "\\")
TypeError: expected an object with the buffer interface

The error message is a bit cryptic given that the problem is that the 
arguments to replace should be bytes instead of strings for a bytes path.

.basename fails with
...
    while i and p[i-1] not in '/\\':
TypeError: 'in <string>' requires string as left operand, not int

os.rename, os.stat, os.mkdir, os.rmdir work.  I presume same is true for 
others that normally work on windows.

tjr