[Python-Dev] Patch for an initial support of bytes filename in Python3

[glyph at divmod.com]

On 12:47 am, victor.stinner at haypocalc.com wrote:

This is the most sane contribution I've seen so far :).
>See attached patch: python3_bytes_filename.patch
>
>Using the patch, you will get:
>- open() support bytes
>- listdir(unicode) -> only unicode, *skip* invalid filenames
>   (as asked by Guido)

Forgive me for being a bit dense, but I couldn't find this hunk in the 
patch.  Do I understand properly that (listdir(bytes) -> bytes)?

If so, this seems basically sane to me, since it provides text behavior 
where possible and allows more sophisticated filesystem wrappers (i.e. 
Twisted's FilePath, Will McGugan's "FS") to do more tricky things, 
separating filenames for display to the user and filenames for exchange 
with the FS.
>- remove os.getcwdu()
>- create os.getcwdb() -> bytes
>- glob.glob() support bytes
>- fnmatch.filter() support bytes
>- posixpath.join() and posixpath.split() support bytes

It sounds like maybe there should be some 2to3 fixers in here somewhere, 
too?  Not necessarily as part of this patch, but somewhere related?  I 
don't know what they would do, but it does seem quite likely that code 
which was previously correct under 2.6 (using bytes) would suddenly be 
mixing bytes and unicode with these APIs.