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

[Victor Stinner]

Hi,

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)
 - remove os.getcwdu()
 - create os.getcwdb() -> bytes
 - glob.glob() support bytes
 - fnmatch.filter() support bytes
 - posixpath.join() and posixpath.split() support bytes

Mixing bytes and str is invalid. Examples raising a TypeError:
 - posixpath.join(b'x', 'y')
 - fnmatch.filter([b'x', 'y'], '*')
 - fnmatch.filter([b'x', b'y'], '*')
 - glob.glob1('.', b'*')
 - glob.glob1(b'.', '*')

$ diffstat ~/python3_bytes_filename.patch
 Lib/fnmatch.py        |    7 +++-
 Lib/glob.py           |   15 ++++++---
 Lib/io.py             |    2 -
 Lib/posixpath.py      |   20 ++++++++----
 Modules/posixmodule.c |   83 
++++++++++++++++++--------------------------------
 5 files changed, 62 insertions(+), 65 deletions(-)

TODO:
 - review this patch :-)
 - support non-ASCII bytes in fnmatch.filter()
 - fix other functions, eg. posixpath.isabs() and fnmatch.fnmatchcase()
 - fix functions written in C: grep FileSystemDefaultEncoding
 - make sure that mixing bytes and str is rejected

-- 
Victor Stinner aka haypo
http://www.haypocalc.com/blog/
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