[Python-Dev] embedding python with numarray

[Guido van Rossum]

> Using Python 2.3.3,
> trying to embed python with numarray,
> my C++ application crashes (segmentation fault) at "import_libnumarray()",
> (I c&p the macro, its within the macro at:
> PyObject *module =
> PyImport_ImportModule("numarray.libnumarray");
> )
> 
> when I:
> 
>     1.
>        initalize python and numarray like:
>     ...
>        Py_Initialize();
>        import_libnumarray();
>     ...
> 
>     2 .
>        load another module like:
> 
>          PyObject* pModule = PyImport_Import(pName);
> 
> 
>     3.
>     call Py_Finalize()
>     and do 1. again.
> 
> The palce where it crashes is:
> Objects/typeobject.c
> line 3004:
> if (basebase->tp_as_sequence == NULL)
> 
> 
> If I call import_libnumarray() only once (ie calling Py_Initialize()
> without import_libnumarray() the second time,
> I cannot use numarray:
> 
> Traceback (most recent call last):
>    File "/usr/local/gdl/gdl/test.py", line 5, in testfun
>      print a
>    File 
> "/usr/local/lib/python2.3/site-packages/numarray/numarraycore.py", line 
> 660, in __str__
>      return array_str(self)
> TypeError: 'NoneType' object is not callable
> 
> 
> Any suggestions?
> How can numarray be restarted properly after a Py_Finalize() ?

This seems to be a numarray problem.  I don't have the numarray source
handy; I suggest that you bring this under the attention of the
numarray developers.  If they can't figure out what they need to fix
we're here to help.

--Guido van Rossum (home page: http://www.python.org/~guido/)