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comp.lang.python
PyImport_ImportModule("cStringIO") failure with undefined symbol
Borse, Ganesh
1/11/2008 1:31:00 AM
Hi,
Can you please guide me for the following problem?
The call to "PyImport_ImportModule("cStringIO");" is failing with an error of "undefined symbol: PyObject_SelfIter".
Before importing this module, I am importing only the sys module.
Py_SetProgramName("/usr/bin/python");
Py_Initialize();
char* argv[] = { "python","-v",""};
PySys_SetArgv(2,argv);
PyRun_SimpleString("import sys");
PyObject *modStringIO = NULL;
// Import cStringIO module
modStringIO = PyImport_ImportModule("cStringIO");
Should I be importing any other additional module(s) to make this import work?
Please help.
I am trying to use the function GetPythonErrorMessage provided in this post:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/9212ebc42e8438a7/f0bd5f5b15902b14?lnk=gst&q=PyErr_Print#f0bd5f...
Thanks in advance for your help.
Regards.
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1 Answer
grbgooglefan
1/31/2008 10:49:00 AM
0
On Jan 11, 9:31 am, "Borse, Ganesh" <ganesh.bo...@credit-suisse.com>
wrote:
> Hi,
> Can you please guide me for the following problem?
> The call to "PyImport_ImportModule("cStringIO");" is failing with an error of "undefined symbol:PyObject_SelfIter".
>
> Before importing this module, I am importing only the sys module.
>
> Py_SetProgramName("/usr/bin/python");
> Py_Initialize();
> char* argv[] = { "python","-v",""};
> PySys_SetArgv(2,argv);
> PyRun_SimpleString("import sys");
>
> PyObject *modStringIO = NULL;
> // Import cStringIO module
> modStringIO = PyImport_ImportModule("cStringIO");
>
> Should I be importing any other additional module(s) to make this import work?
>
> Please help.
>
> I am trying to use the function GetPythonErrorMessage provided in this post:
http://groups.google.com/group/comp.lang.python/browse_thre...
...
>
> Thanks in advance for your help.
> Regards.
==========================================
Function "PyObject_SelfIter" is part of libPython.a. But when library
which is linked with libPython.a tries to import cStringIO (which is
nothing but dlopen("lib-dynload/cStringIO.so"), ld.so does not find
this symbol.
So, as a workaround, we can get the cStringIO.so also linked with the
library which has linked libPython.a.
By this we ensure that PyObject_SelfIter is already resolved in the
library.
Then at the time of importing cStringIO at runtime, this symbol is
already referenced & won't cause problems.
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