python/swig
Hy,
I need help indeed, about python/swig C wrapper. Exactly, I've built
a python library from C library and it seem works. Unfortunatly, a
gruop of function that requred pointer to pointer parmeters give me a
exception like this:
"TypeError: in method 'BestRules', argument 1 of type 'value_type **'"
I've tryed to use cpointer.i to obtain a pointer to use in function
but this don't work.
Could you help me?
thanks in advace.
Gianluca Massei
PS. this is my interface.i file:
"
%module pyRSL
%include "cpointer.i"
%{
#include "rough.h"
#include "raccess.h"
#include "rbasic.h"
#include "rclass.h"
#include "rcore.h"
#include "reduct1.h"
#include "reduct2.h"
#include "rerror.h"
#include "rset.h"
#include "rsystem.h"
#include "rule1.h"
#include "rule2.h"
%}
%include "rough.h"
%include "raccess.h"
%include "rbasic.h"
%include "rclass.h"
%include "rcore.h"
%include "reduct1.h"
%include "reduct2.h"
%include "rerror.h"
%include "rset.h"
%include "rsystem.h"
%include "rule1.h"
%include "rule2.h"
"
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rough set & python
I've just wrapped the rough set library from C to python. Could anybody help me to test it and debug? thanks Gianluca -- http://mail.python.org/mailman/listinfo/python-list
ctypes help
Hy,
I need help about use dll with ctypes. I've compiled my dll C library
and I copied it in c:\windows\system32. When I load it with
"myDLL=cdll.LoadLibrary(find_library("myDLL.dll"))" It seem all OK but
python don't see the dll function. with dir(myDLL) I've only this:
['_FuncPtr', '__class__', '__delattr__', '__dict__', '__doc__',
'__getattr__', '__getattribute__', '__getitem__', '__hash__',
'__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',
'__repr__', '__setattr__', '__str__', '__weakref__', '_handle',
'_name']
Could anybody help me
Thanks
Gianluca
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Re: ctypes help
On 23 Mag, 01:14, Larry Bates <[EMAIL PROTECTED]> wrote:
> gianluca wrote:
> > Hy,
> > I need help about use dll with ctypes. I've compiled my dll C library
> > and I copied it in c:\windows\system32. When I load it with
> > "myDLL=cdll.LoadLibrary(find_library("myDLL.dll"))" It seem all OK but
> > python don't see the dll function. with dir(myDLL) I've only this:
> > ['_FuncPtr', '__class__', '__delattr__', '__dict__', '__doc__',
> > '__getattr__', '__getattribute__', '__getitem__', '__hash__',
> > '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',
> > '__repr__', '__setattr__', '__str__', '__weakref__', '_handle',
> > '_name']
>
> > Could anybody help me
>
> > Thanks
>
> > Gianluca
>
> Since it isn't python, dir can'd do much introspection on the object to
> produce
> the type of output you desire. You have to know the functions (methods) that
> you want to call in your dll and call them.
>
> -Larry Bates
Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an
exception like this:
Traceback (most recent call last):
File "", line 1, in
myDLL.myFUNCT()
File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__
func = self.__getitem__(name)
File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__
func = self._FuncPtr((name_or_ordinal, self))
AttributeError: function 'myFUNCT' not found
Thanks for help
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Re: ctypes help
On 23 Mag, 07:48, Marc 'BlackJack' Rintsch <[EMAIL PROTECTED]> wrote: > On Thu, 22 May 2008 21:55:41 -0700, gianluca wrote: > > Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an > > exception like this: > > > Traceback (most recent call last): > > File "", line 1, in > > myDLL.myFUNCT() > > File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__ > > func = self.__getitem__(name) > > File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__ > > func = self._FuncPtr((name_or_ordinal, self)) > > AttributeError: function 'myFUNCT' not found > > Then maybe the DLL doesn't contain a function called `myFUNCT`. Any > chance you compiled your C as C++ and name mangling kicked in? > > Can you show a minimal C source for a DLL, how you compiled it, what you > did on the Python side to call it, and how it fails? > > Ciao, > Marc 'BlackJack' Rintsch I've located my dll in c:\windows\system32 (in linux I aven't any problem) and I compiled it with dev-c++. The source code is C standard ANSII and is quite havy. If you like I can send it via mail (you can realy at [EMAIL PROTECTED]) . I've tryed to build a wrape with swig olso with same code and I can access at all the function. thanks Gianluca -- http://mail.python.org/mailman/listinfo/python-list
Re: ctypes help
On 23 Mag, 12:30, Nick Craig-Wood <[EMAIL PROTECTED]> wrote:
> gianluca <[EMAIL PROTECTED]> wrote:
> > On 23 Mag, 07:48, Marc 'BlackJack' Rintsch <[EMAIL PROTECTED]> wrote:
> > > On Thu, 22 May 2008 21:55:41 -0700, gianluca wrote:
> > > > Yes, I know it but when I load a function (a=myDLL.myFUNCT()) I've an
> > > > exception like this:
>
> > > > Traceback (most recent call last):
> > > > File "", line 1, in
> > > > myDLL.myFUNCT()
> > > > File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__
> > > > func = self.__getitem__(name)
> > > > File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__
> > > > func = self._FuncPtr((name_or_ordinal, self))
> > > > AttributeError: function 'myFUNCT' not found
>
> > > Then maybe the DLL doesn't contain a function called `myFUNCT`. Any
> > > chance you compiled your C as C++ and name mangling kicked in?
>
> > > Can you show a minimal C source for a DLL, how you compiled it, what you
> > > did on the Python side to call it, and how it fails?
>
> > > Ciao,
> > > Marc 'BlackJack' Rintsch
>
> > I've located my dll in c:\windows\system32 (in linux I aven't any
> > problem) and I compiled it with dev-c++. The source code is C standard
> > ANSII and is quite havy. If you like I can send it via mail (you can
> > realy at [EMAIL PROTECTED]) . I've tryed to build a wrape with swig
> > olso with same code and I can access at all the function.
>
> You can use objdump from mingw or cygwin to look inside the dll and
> see exactly what it is exporting, eg
>
> objdump -x OurSharedCodeLibrary.dll
>
> This prints a great deal of stuff! In the middle you'll see
>
> [snip]
> The Export Tables (interpreted .rdata section contents)
> [snip]
> Ordinal/Name Pointer] Table
> [ 0] OSCL_DEBUG_fakeInitComplete
> [ 1] OSCL_close
> [ 2] OSCL_displayIdent
> [ 3] OSCL_getCurrentDynamicParams
> [ 4] OSCL_getCurrentStaticParams
> [ 5] OSCL_getErrorString
> [ 6] OSCL_getIdent
> [snip]
>
> This is a dll we used in a project, and those names exactly worked
> with ctypes, eg some snips from the ctypes code
>
> self.dll = cdll.LoadLibrary("OurSharedCodeLibrary")
> self.dll.OSCL_getErrorString.restype = c_char_p
>
> def getErrorString(self, status):
> return self.dll.OSCL_getErrorString(c_int(status))
>
> --
> Nick Craig-Wood <[EMAIL PROTECTED]> --http://www.craig-wood.com/nick
Thank you for help!
I've done all you suggest and I've a objdump output like this:
...
[ 86](sec 1)(fl 0x00)(ty 20)(scl 2) (nx 0) 0x3755 _IsCoverRelD
[ 87](sec 1)(fl 0x00)(ty 20)(scl 2) (nx 0) 0x3657 _IsCoverRelA
[ 88](sec 1)(fl 0x00)(ty 20)(scl 2) (nx 0) 0x34f5 _IsCoverDX
[ 89](sec 1)(fl 0x00)(ty 20)(scl 2) (nx 0) 0x341b _IsCoverA
[ 90](sec 1)(fl 0x00)(ty 20)(scl 2) (nx 0) 0x3072 _CoreRelD
[ 91](sec 1)(fl 0x00)(ty 20)(scl 2) (nx 0) 0x2f5e _CoreRelA
...
my funtions are the __IsCoverRelD, __IsCoverRelA, etc but when I call
it (myLIB.__IsCoverRelA or myLIB.__IsCoverRelA()) I've the same
problem.
Hy
gianluca
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printf in python
Hy, I've a problem with may python library generated with swig from C
code. I works and I can access all function but a simèple function
that print a string don't work's.
The function is like this:
int PrintTEST()
{
printf("TEST ");
return 1;
}
If I call the function (myDLL.PrintTEST() ) the function print only
the returned value, not the string "TEST". Could anybody help me?
Thanks
Gianluca
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Re: printf in python
On 2 Giu, 10:08, Hrvoje Niksic <[EMAIL PROTECTED]> wrote:
> gianluca <[EMAIL PROTECTED]> writes:
> > Hy, I've a problem with may python library generated with swig from C
> > code. I works and I can access all function but a simèple function
> > that print a string don't work's.
> > The function is like this:
> > int PrintTEST()
> > {
> > printf("TEST ");
> > return 1;
> > }
>
> Finish the printed string with a newline, or call fflush(stdout). By
> default stdout is line-buffered when connected to interactive displays.
Exuse me!
How could use it?. I've tried with '\n' without result.
Thanks
Gianluca
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Re: printf in python
On 2 Giu, 17:54, Dennis Lee Bieber <[EMAIL PROTECTED]> wrote:
> On Mon, 2 Jun 2008 00:32:33 -0700 (PDT), gianluca <[EMAIL PROTECTED]>
> declaimed the following in comp.lang.python:
>
> > Hy, I've a problem with may python library generated with swig from C
> > code. I works and I can access all function but a simèple function
> > that print a string don't work's.
> > The function is like this:
> > int PrintTEST()
> > {
> > printf("TEST ");
> > return 1;
> > }
>
> > If I call the function (myDLL.PrintTEST() ) the function print only
> > the returned value, not the string "TEST". Could anybody help me?
>
> Are you running from a command shell?
>
> If you are testing from inside something like IDLE (or PythonWin, or
> pretty much any other GUI development system) you may not have a stdout
> for display by C code...
>
> The return value would be printed by the Python interpreter in
> interactive mode...
> --
> WulfraedDennis Lee Bieber KD6MOG
> [EMAIL PROTECTED] [EMAIL PROTECTED]
> HTTP://wlfraed.home.netcom.com/
> (Bestiaria Support Staff: [EMAIL PROTECTED])
> HTTP://www.bestiaria.com/
Hy,
the problem exists both in command shell and in IDLE. The value is
correct returned in both envirnment.
gianluca
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Re: printf in python
On 2 Giu, 20:51, gianluca <[EMAIL PROTECTED]> wrote:
> On 2 Giu, 17:54, Dennis Lee Bieber <[EMAIL PROTECTED]> wrote:
>
>
>
> > On Mon, 2 Jun 2008 00:32:33 -0700 (PDT), gianluca <[EMAIL PROTECTED]>
> > declaimed the following in comp.lang.python:
>
> > > Hy, I've a problem with may python library generated with swig from C
> > > code. I works and I can access all function but a simèple function
> > > that print a string don't work's.
> > > The function is like this:
> > > int PrintTEST()
> > > {
> > > printf("TEST ");
> > > return 1;
> > > }
>
> > > If I call the function (myDLL.PrintTEST() ) the function print only
> > > the returned value, not the string "TEST". Could anybody help me?
>
> > Are you running from a command shell?
>
> > If you are testing from inside something like IDLE (or PythonWin, or
> > pretty much any other GUI development system) you may not have a stdout
> > for display by C code...
>
> > The return value would be printed by the Python interpreter in
> > interactive mode...
> > --
> > WulfraedDennis Lee Bieber KD6MOG
> > [EMAIL PROTECTED] [EMAIL PROTECTED]
> > HTTP://wlfraed.home.netcom.com/
> > (Bestiaria Support Staff: [EMAIL PROTECTED])
> > HTTP://www.bestiaria.com/
>
> Hy,
> the problem exists both in command shell and in IDLE. The value is
> correct returned in both envirnment.
>
> gianluca
Anybody help me?
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Re: printf in python
On 3 Giu, 12:48, gianluca <[EMAIL PROTECTED]> wrote:
> On 2 Giu, 20:51, gianluca <[EMAIL PROTECTED]> wrote:
>
>
>
> > On 2 Giu, 17:54, Dennis Lee Bieber <[EMAIL PROTECTED]> wrote:
>
> > > On Mon, 2 Jun 2008 00:32:33 -0700 (PDT), gianluca <[EMAIL PROTECTED]>
> > > declaimed the following in comp.lang.python:
>
> > > > Hy, I've a problem with may python library generated with swig from C
> > > > code. I works and I can access all function but a simèple function
> > > > that print a string don't work's.
> > > > The function is like this:
> > > > int PrintTEST()
> > > > {
> > > > printf("TEST ");
> > > > return 1;
> > > > }
>
> > > > If I call the function (myDLL.PrintTEST() ) the function print only
> > > > the returned value, not the string "TEST". Could anybody help me?
>
> > > Are you running from a command shell?
>
> > > If you are testing from inside something like IDLE (or PythonWin,
> > > or
> > > pretty much any other GUI development system) you may not have a stdout
> > > for display by C code...
>
> > > The return value would be printed by the Python interpreter in
> > > interactive mode...
> > > --
> > > WulfraedDennis Lee Bieber KD6MOG
> > > [EMAIL PROTECTED] [EMAIL PROTECTED]
> > > HTTP://wlfraed.home.netcom.com/
> > > (Bestiaria Support Staff: [EMAIL PROTECTED])
> > > HTTP://www.bestiaria.com/
>
> > Hy,
> > the problem exists both in command shell and in IDLE. The value is
> > correct returned in both envirnment.
>
> > gianluca
>
> Anybody help me?
I know!! I'm bore!! But I need help indeed!!
I'm looking inside lib_wrap.c generated by swig. In the wrap function
there is no printf function. If is this the problem how can I do to
resolve it?
thanks
Gianluca
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Re: printf in python
On 4 Giu, 03:46, "Gabriel Genellina" <[EMAIL PROTECTED]> wrote:
> En Tue, 03 Jun 2008 10:28:57 -0300, gianluca <[EMAIL PROTECTED]>
> escribió:
>
>
>
> >> > > On Mon, 2 Jun 2008 00:32:33 -0700 (PDT), gianluca
> >> <[EMAIL PROTECTED]>
> >> > > declaimed the following in comp.lang.python:
>
> >> > > > Hy, I've a problem with may python library generated with swig
> >> from C
> >> > > > code. I works and I can access all function but a simèple
> >> function
> >> > > > that print a string don't work's.
> >> > > > The function is like this:
> >> > > > int PrintTEST()
> >> > > > {
> >> > > > printf("TEST ");
> >> > > > return 1;
> >> > > > }
>
> > I know!! I'm bore!! But I need help indeed!!
> > I'm looking inside lib_wrap.c generated by swig. In the wrap function
> > there is no printf function. If is this the problem how can I do to
> > resolve it?
>
> Generated swig code is... uhm, ugly at least, and rather undebuggable. I'd
> try to avoid it.
> Another alternative is Cython: I've not actually used it myself, but I've
> seen good reports from it.
> If your library is written in C (not C++), you may use directly ctypes
> from inside Python.
>
> --
> Gabriel Genellina
Yes, I've tried it (ctypes) but I've problems about pointer as
function arguments. I've several truble with it... but I'm working
both in ctypes and swig.
Thank
Gianluca
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ctypes help
hy, I've a huge problem with ctypes. I've compiled my C library and I'd like use it in python with ctype. One function need to pass a pointer to typed ( like this: typedef int value_type). In python I can access to that funtion but arise an exception because python don't know my value_type typedef. Please I need help, could anybody help me? Gianluca -- http://mail.python.org/mailman/listinfo/python-list
#define in swig
I've a problem with python wrapper of C library. In a library's file there are #define istruction but I can't access it from python. Other functio works correctly. The define istruction is like this: #define START_OF_D _table_element=_mainsys- >matD,_table_end=_table_element+Dsize(_mainsys) #define START_OF_X _table_element=_mainsys- >matX,_table_end=_table_element+_mainsys->matXsize #define START_OF_MAT(set,num) _table_element=(set),_table_end=_table_element+(num)*_mainsys- >setAsize #define END_OF_MAT (_table_element<_table_end) #define NEXT_OF_MAT_table_element+=_mainsys->setAsize #define ELEM_OF_MAT_table_element #define ElemOfRule(rules,num,attr) (rules)[(num)*(_mainsys- >attributes_num)+(attr)] thanks Gianluca -- http://mail.python.org/mailman/listinfo/python-list
ctypes - swig - pointer
I've a problem with dll function colled with python/ctypes. My functions (C) requred a typedef int "value_type" in tree different way: same as value_type; - mydll.foo1(value_type) same as *value_type; - mydll.foo2(*value_type) same as **value_type; - mydll.foo3(**value_type) How can pass it in python. If i do that: rules=POINTER(value_type) opr=rsl.StrengthOfRules(rules,10) R=POINTER(rules) I've this exception: Traceback (most recent call last): File "C:\temp\cRSL.py", line 49, in opr=rsl.StrengthOfRules(rules,10) #/* Creates a table of rules strengths. */ ArgumentError: argument 1: : Don't know how to convert parameter 1 I've tried with swig (cpointer.i) olso but the library don't work correctly and rules look empty. I need help. Could anybody give mi it? gima -- http://mail.python.org/mailman/listinfo/python-list
Re: ctypes - swig - pointer
On 30 Giu, 18:26, Jean-Paul Calderone <[EMAIL PROTECTED]> wrote: > On Mon, 30 Jun 2008 09:13:42 -0700 (PDT), gianluca <[EMAIL PROTECTED]> wrote: > >I've a problem with dll function colled with python/ctypes. My > >functions (C) requred a typedef int "value_type" in tree different > >way: > >same as value_type; - mydll.foo1(value_type) > >same as *value_type; - mydll.foo2(*value_type) > >same as **value_type; - mydll.foo3(**value_type) > > >How can pass it in python. If i do that: > >rules=POINTER(value_type) > >opr=rsl.StrengthOfRules(rules,10) > >R=POINTER(rules) > > POINTER takes a class and returns a new class which represents a pointer > to input class. > > pointer takes an instance and returns a new object which represents a > pointer to that instance. > > Jean-Paul so, if I write this: p=pointer(value_type) mydll.foo1(p) could be correct but python say me: TypeError: _type_ must have storage info what does mean? thank you gima -- http://mail.python.org/mailman/listinfo/python-list
__stack_chk_fail_local
hy list, I've built _libfoo.so and libfoo.py library with swig and I've copied in /usr/lib/python2.5/lib-dynload/ but when import the module >>import libfoo I've that message Traceback (most recent call last): File "", line 1, in ImportError: /usr/lib/python2.5/lib-dynload/_libfoo.so: undefined symbol: __stack_chk_fail_local Could anybody help me? gianluca -- http://mail.python.org/mailman/listinfo/python-list
Re: __stack_chk_fail_local
On 30 Ago, 12:05, "Marco Bizzarri" <[EMAIL PROTECTED]> wrote: > On Fri, Aug 29, 2008 at 7:53 PM, gianluca <[EMAIL PROTECTED]> wrote: > > hy list, > > I've built _libfoo.so and libfoo.py library with swig and I've copied > > in /usr/lib/python2.5/lib-dynload/ but when import the module > > >>>import libfoo > > > I've that message > > > Traceback (most recent call last): > > File "", line 1, in > > ImportError: /usr/lib/python2.5/lib-dynload/_libfoo.so: undefined > > symbol: __stack_chk_fail_local > > > Could anybody help me? > > > gianluca > > -- > >http://mail.python.org/mailman/listinfo/python-list > > Have you tried to use ldd against the _libfoo.so to check if it is > able to get all the libraries it needs? > > Regards > Marco > > -- > Marco Bizzarrihttp://iliveinpisa.blogspot.com/ I've tried with ldd and the library aren't loaded. I don't use my *.i interface so is quite difficult modify it (realy, the libraru is supplied with make). Any suggests? gianluca -- http://mail.python.org/mailman/listinfo/python-list
Web framework
Hi guys, What web framework do you suggest to develop with? I had a look both at Nevow and Quixote. These seemes to be the most appreciated by the community. Anyway, I had no luck looking for a complete and coherent documentation. Thanks for any suggestion, Gianluca -- http://mail.python.org/mailman/listinfo/python-list
Re: Web framework
Hi Christian, thanks for your replay. I gave a quick look at cherryPy too, but I had the impression it wasn't enought to be used in a real world contest. What about performances? Can I safely consider it to develop an Intranet/Extranet? My main concern is with scalability. What will happend if my user-base will grow? What if I had to add web services interface (say XML-RPC or SOAP) to my application? Can I do it in a second time without spending too much time/money? Thanks, Gianluca -- http://mail.python.org/mailman/listinfo/python-list
Re: Web framework
Well, my concern here was mostly about SSL support. It seems it's not supported natively. Anyway, I'm looking at all those frameworks by a 'pre-evaluation' point of you. so I'm fully trusting what I can read on their websites... -- http://mail.python.org/mailman/listinfo/python-list
Python and lotus notes
Hi,
i am having a problem when i try to access lotus notes with python, think i do
all ok but it seems something is going wrong because i can't print any db title
even if i've opened the .nsf file.
My code:
import win32com.client
from win32com.client import Dispatch
notesServer='Mail\wed\new\IT'
notesFile= 'Apps\Mydb.nsf'
notesPass= 'mypass'
session = Dispatch('Lotus.NotesSession')
session.Initialize(notesPass)
print ""
db = session.getDatabase(notesServer, notesFile)
print db.Open
print db.IsOpen
print db.Title
but i receve:
>>
False
Please can u help me?
GL
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Re: Python and lotus notes
Il giorno lunedì 20 aprile 2015 10:29:42 UTC+2, gianluc...@gmail.com ha scritto:
> Hi,
>
> i am having a problem when i try to access lotus notes with python, think i
> do all ok but it seems something is going wrong because i can't print any db
> title even if i've opened the .nsf file.
>
> My code:
>
> import win32com.client
> from win32com.client import Dispatch
>
> notesServer='Mail\wed\new\IT'
> notesFile= 'Apps\Mydb.nsf'
> notesPass= 'mypass'
>
> session = Dispatch('Lotus.NotesSession')
> session.Initialize(notesPass)
> print ""
>
> db = session.getDatabase(notesServer, notesFile)
>
> print db.Open
> print db.IsOpen
> print db.Title
>
> but i receve:
>
> >>
> False
>
> Please can u help me?
> GL
hi!
ive tried but i get this error:
File "", line 2, in Open
com_error: (-2147352567, 'Eccezione.', (0, 'NotesDatabase', 'Database open
failed (Mail\wed/new/IT!!Apps\Mydb.nsf')', None, 0, -2147217461), None)
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Re: __stack_chk_fail_local
thanks for the help, maybe the solution will be useful: in "various Linux distributions are starting to ship with a version of the GNU C compiler which incorporates an extension which implements protection for stack-smashing". In that case the Makefile has to modified with CFLAGS = -fno-stack-protector gianluca Marco Bizzarri wrote: On Sat, Aug 30, 2008 at 3:03 PM, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: Thanks! I've resolved the problem with libraries but... I've still error with this message: ImportError: ./_python_grass6.so: undefined symbol: __stack_chk_fail_local exuse me, I'm not a guru. Gianluca I'm not a guru either, Gianluca ;) I made a little search on Google; the first link is the following: http://ubuntuforums.org/showthread.php?t=352642 can you apply the suggestion? I think you should give a little more context on your problem, also, because I think it has to do with your setup (not that you setup something in the wrong way: just to have context). Regards Marco -- http://mail.python.org/mailman/listinfo/python-list
