Nick Coghlan added the comment:
Makes sense to me. Assuming we eventually manage to resolve the POSIX locale
issue, the bytes variant will become even less useful.
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resolution: later - rejected
status: open - closed
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Python tracker
Nick Coghlan added the comment:
I'd like to revisit this after PEP 432 is in place, since having to do this
dance for arg processing when running on Linux in the POSIX locale is somewhat
lame:
argv = sys.argv
encoding = locale.getpreferredencoding() # Hope nobody changed the locale!
Raymond Hettinger added the comment:
Without commenting on this specific proposal, I would like to make an overall
observation that Python is impairing its usability by adding
too-many-ways-to-it in a number of categories (file descriptor variants of file
methods, multiple versions of
STINNER Victor added the comment:
Today I regret os.environb (I added it). If I remember correctly, os.environb
was added before the PEP 383 (surrogateescape). This PEP makes os.environb
almost useless. In Python 3, Unicode is the natural choice, and thanks to the
PEP 383, it's still possible
STINNER Victor victor.stin...@haypocalc.com added the comment:
One year after opening the issue, I don't have any real use case. And there are
technical issues to implement this feature, so I prefer just to close this
issue. Reopen it if you really want it, but please give an use case ;-)
Changes by R. David Murray rdmur...@bitdance.com:
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stage: - needs patch
type: - feature request
versions: +Python 3.3 -Python 3.2
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STINNER Victor victor.stin...@haypocalc.com added the comment:
Prototype (in Python) of argvb.py. Try it with: ./python -i argvb.py.
It's not possible to create sys.argvb in Python in a module loaded by
Py_Initialize(), because sys.argv is created after Py_Initialize().
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Added file:
STINNER Victor victor.stin...@haypocalc.com added the comment:
Since r85765 (issue #4388), always use UTF-8 to decode the command line
arguments on Mac OS X, not the locale encoding. Which means that the
pseudo-code becomes:
if os.name != 'nt':
if sys.platform == 'darwin':
STINNER Victor victor.stin...@haypocalc.com added the comment:
Using that approach would work on POSIX systems.
As os.environb, I think that sys.argv should not exist on Windows.
Another problem I see is synchronizing the two
os.environ and os.environb are synchronized. It would be possible
Marc-Andre Lemburg m...@egenix.com added the comment:
STINNER Victor wrote:
STINNER Victor victor.stin...@haypocalc.com added the comment:
Using that approach would work on POSIX systems.
As os.environb, I think that sys.argv should not exist on Windows.
Another problem I see is
STINNER Victor victor.stin...@haypocalc.com added the comment:
no byte-oriented representation of the command line is readily available.
Why not using the following recipe?
encoding = locale.getpreferredencoding()
sys.argvb = [arg.decode(encoding, 'surrogateescape') for arg in argv]
STINNER Victor victor.stin...@haypocalc.com added the comment:
You should read .encode(), not .decode() :-/
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Changes by Ezio Melotti ezio.melo...@gmail.com:
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nosy: +ezio.melotti
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Martin v. Löwis mar...@v.loewis.de added the comment:
Using that approach would work on POSIX systems.
Another problem I see is synchronizing the two. If some function strips
arguments from sys.argv (because it has completed processing), sys.argvb would
still keep the arguments. Of course,
New submission from STINNER Victor victor.stin...@haypocalc.com:
In some situations, the encoding of the command line is incorrect or unknown.
sys.argv is decoded with the file system encoding which can be wrong. Eg. see
issue #4388 (ok, it's a bug, it should be fixed).
As os.environb, it
Amaury Forgeot d'Arc amaur...@gmail.com added the comment:
sys.argv is decoded with the file system encoding
IIRC this is not exact. Py_Main signature is
Py_Main(int argc, wchar_t **argv)
then PyUnicode_FromWideChar is used, and there is no conversion (except from
UCS4 to UCS2).
The
STINNER Victor victor.stin...@haypocalc.com added the comment:
The wchar_t strings themselves are built with mbstowcs(),
the file system encoding is not used.
Oops sorry, you are right, and it's worse :-) sys.argv is decoded using the
locale encoding, but subprocess cie use the file system
Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com:
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nosy: +Arfrever
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Martin v. Löwis mar...@v.loewis.de added the comment:
As os.environb, it would be useful to have bytes version of sys.argv
to have able to decide the encoding used to decode each argument, or
to manipulate bytes if we don't care about the encoding.
-1. Py_Main expects wchar_t*, so no
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