[issue15028] PySys_SetArgv escapes quotes in argv[]

[Zachary Ware]

Zachary Ware  added the comment:

Lacking a response from the OP, I'm closing the issue.

--
nosy: +zach.ware
resolution:  -> not a bug
stage:  -> resolved
status: languishing -> closed

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[issue15028] PySys_SetArgv escapes quotes in argv[]

[Christian Heimes]

Changes by Christian Heimes li...@cheimes.de:


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nosy: +christian.heimes
status: open - languishing

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[issue15028] PySys_SetArgv escapes quotes in argv[]

[R.M.Bianchi]

New submission from R.M.Bianchi riccardomaria.bian...@gmail.com:

Embedding Python in C++ I saw that if I pass this string below to the 
PySys_SetArgv, as one of the command-line arguments passed to an embedded 
script:

--net-label-name='(DC1,eth1)'

PySys_Argv transforms it escaping the single quotes, and in the Python side I 
get this value for sys.argv[i]:

'--net-label-name=\'(DC1,eth1)\''

It does not seem a problem of converting strings or char in the C++ sides, I 
checked them.

The problem appears just after the PySys_Argv call.

=== cut ===
Qt-Debug: python script command-line args: 
(/afs/cern.ch/work/r/rbianchi/private/tdaq_4_0_0/dbe/cmt/pm_farm.py, 
--safe-hw-tags, --add='pcatd143', --net-label-name='(DC1,eth1)', 
newdb.data.xml)
[...]
pyout: sys.argv:
pyout:
pyout: ['/afs/cern.ch/work/r/rbianchi/private/tdaq_4_0_0/dbe/cmt/pm_farm.py', 
'--safe-hw-tags', --add='pcatd143', '--net-label-name=\'(DC1,eth1)\'', 
'newdb.data.xml']
=== cut ===

Please notice that the same script works perfectly with the same argument list 
in stand-alone mode (i.e. not embedded in C++).

Please also notice that in the embedded side the problem does not appear if I 
substitute the string passed as command line parameter from the original one:

--net-label-name='(DC1,eth1)'

to this one below, where I omit a level of quotes and I skip the double quotes:

--net-label-name=('DC1','eth1')

In this last case the embedded script also works fine in the embedded world.

It seems to me an issue in PySys_SetArgv, while parsing the strings. But maybe 
I'm missing something.

Best regards,

  R.M.Bianchi

--
components: Interpreter Core
messages: 162478
nosy: RMBianchi
priority: normal
severity: normal
status: open
title: PySys_SetArgv escapes quotes in argv[]
type: behavior
versions: Python 2.6

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[issue15028] PySys_SetArgv escapes quotes in argv[]

[R. David Murray]

R. David Murray rdmur...@bitdance.com added the comment:

Could you please clarify the inputs and outputs.  I can't tell from your 
description what exact byte string you are passing in from C++ or what exact 
string you are seeing on the Python side.  For example, if:

  '--net-label-name=\'(DC1,eth1)\''

is the python repr of a string, it is equivalent to the ASCII byte sequence:

  --net-label-name='(DC1,eth1)'

Most likely that is what you are passing in from C++, in which case everything 
seems to be to be working as expected.  So if that is not the case, please 
clarify.

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